![](data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 72 71" width="72"></svg>)
A and B leave from ab respectively. Car a travels 96 kilometers per hour, and car B 88 kilometers per hour. When they meet, they are 40 kilometers away from the midpoint of ab. how many kilometers are ab from each other?
Let AB be 2x apart, then by using their equal time, (x + 40) / 96 = (x-40) / 88, we get x = 920, so AB is 1840 meters apart
(96 + 88) * 40 / (96-88) = 960km
A and B drive from AB for 6 hours at the same time. After meeting, the two vehicles continue to move forward. At 4 o'clock, a arrives at B, and B is 250 kilometers away from a
It takes 6 + 4 = 10 hours for car a to complete the whole journey. When meeting, car a takes 6 / 10 of the whole journey, that is, 3 / 5. When meeting, car B takes 1-3 / 5 = 2 / 5 of the whole journey, car B takes 2 / 5 of the whole journey in 6 hours, car B takes 2 / 5 △ 6 = 1 / 15 of the whole journey every hour, car B also takes 10 hours, and car B takes 1 / 15 × 10 = 2 / 3 of the whole journey
Hello!
A / b speed ratio 6:4 = 3:2
AB whole course 250 △ 3-2 X3 = 750 km
If you don't understand this question, you can ask. If you are satisfied, please click "adopt as a satisfactory answer" in the lower right corner
If you have any other questions, please take this question and send it to me. Please understand. Thank you.
I wish you progress in your study! O(∩_ ∩)O
thank you. ... unfold
Hello!
A / b speed ratio 6:4 = 3:2
AB whole course 250 △ 3-2 X3 = 750 km
If you don't understand this question, you can ask. If you are satisfied, please click "adopt as a satisfactory answer" in the lower right corner
If you have any other questions, please take this question and send it to me. Please understand. Thank you.
I wish you progress in your study! O(∩_ ∩)O
thank you. Put it away
There are 70 tons of goods to be transported from land a to land B. the carrying capacity of large trucks is 11 tons, and that of small trucks is 6 tons,
The oil consumption of a small truck is 7 liters. Q: the minimum oil consumption after transporting this batch of goods________ (detailed process)
70/11=6.4
6*11+1*7=73
Write out the general term formula of a sequence of numbers so that the first few terms are the following numbers
1 / 2, - 1 / 2,3 / 8, - 1 / 4
1, 3, 6, 10, 15
The first question is actually 1 / 2, - 2 / 4, - 3 / 8, - 4 / 16
So the general term is n / 2 * (- 1 / 2) ^ (n-1)
Question 2 n (n + 1) / 2
The second is n (n + 1) / 2, that is, each term is the sum of the first n terms of the natural sequence.
The first one doesn't understand~
If it takes more than 2 hours to get to the two places ahead of schedule, then the distance between the two places is more than 2 hours?
More (s / A-2 - S / a) km
First find the original speed, and then subtract the current speed, and the current time can also be expressed, so what's your problem
S / (A-2) - S / A~
There are 59 tons of goods to be transported from place a to place B. the carrying capacity of large trucks is 7 tons, and that of small trucks is 4 tons. The fuel consumption of large trucks is 14 liters, and that of small trucks is 9 liters. So how many liters of fuel will be consumed at least?
The fuel consumption per ton of large trucks is 14 △ 7 = 2 (L); that of small trucks is 9 △ 4 = 2.25 (L), so the fuel consumption per ton of large trucks is less. Therefore, under the condition of full load as far as possible, the fuel consumption of large trucks is the least If 8 large trucks are used, the fuel consumption of 1 small truck is 8 × 14 + 1 × 9, = 112 + 9, = 121 (L). If 7 large trucks are used, the fuel consumption of 3 small trucks is 14 × 7 + 3 × 9, = 98 + 27, = 125 (L), 125 ＞ 121. 8 large trucks are needed, and 1 small truck can be fully loaded. The fuel consumption is 121 L. A: the minimum fuel consumption is 121 L after transporting these goods It's a liter
Output the first 20 items of Fibonacci sequence, one number per line
#include
using namespace std;
int main()
{int a,b,i;
a=1;
print("%d\n",a);
for(i=0;i
The distance between a and B is s kilometers. Someone drives from a to B. he originally planned to arrive in a hour, but he arrived two hours ahead of time. The actual time is shorter than that
The original plan is too much_____ Km. The first speed is () and the second speed is () good bonus points
Original speed = s / a -- that is, the first speed
Actual speed = s / (A-2) - that is, the second speed
Therefore, the actual number of lines per hour is more than the original plan__ s/(a-2)-s/a___ Kilometer
The distance between a and B is s kilometers. Someone drives from a to B, and the original plan is a hour. As a result, he arrives two hours ahead of schedule. In fact, every hour is s / (A-2) - S / a kilometers more than the original plan
The first velocity is (s / a),
The second velocity is s / (A-2)
The original planned speed was s / a km / h. The speed of arriving 2 hours in advance is s / (A-2) km / h. The actual line per hour is s / (A-2) - S / a = 2S / (a (A-2)) a km more than the original plan
The first speed s ＼ a, the second speed s ＼ (A-2), more lines per hour on the two subtraction
There are 1575 tons of goods transported from place a to place B. the carrying capacity of large trucks is 5 tons, and that of small trucks is 2 tons. Large trucks and small trucks each transport one time
Then: the fuel consumption of fuel is 10 liters and 5 liters respectively. Q: how to select vehicles to minimize the fuel consumption of transportation? How many liters of gasoline is required?
Let's make a list
It's not 1575 tons, it's 1576 tons!
Try to use big cars, and use small cars for the rest,
1576 △ 5 = 315 1 ton
The remaining 1 ton will be transported by a small car
Total oil consumption 315 * 10 + 5 = 3155 liters
1570/5=314
The rest of the car
Three times,
314 * 10 + 3 * 5 = 3155 tons
Starting from 1, write an integer every two integers to get a sequence: 1, 4, 7, 10 Q: what is the 100th number?
1 + (100-1) × 3 = 1 + 99 × 3, = 298; answer: the 100th number is 298
RELATED INFORMATIONS
- 1. A and B leave from ab at the same time. B, a travels 50 kilometers per hour, B 40 kilometers per hour. When they meet, a travels 40 kilometers more than B Kilometer, seek the distance between two places
- 2. The two cars leave AB at the same time. A drives 45 kilometers per hour and B 48 kilometers per hour. After the first meeting, the two cars continue to move forward After the two cars arrived at AB, they immediately went back to the original road. The two cars drove for 3 hours from the beginning to the second meeting. How many kilometers are there between the two places?
- 3. A and B two cars from both sides of AB at the same time, meet for the first time at 60 kilometers away from a, after meeting continue to move forward, each arrived at the other's starting place immediately On the way back, I met again 40 kilometers away from A. how many kilometers away is ab
- 4. A and B meet each other at the same time. The distance between a and B is 60km
- 5. The speed ratio of the bus to the truck is 5:3, and the bus travels 40 kilometers per hour to find the road length
- 6. The speed ratio of the car to the truck is 4:7. The car and the truck leave from two places and meet 15 kilometers away from the midpoint. How many kilometers did the truck travel?
- 7. A and B vehicles leave from ab at the same time. It is known that a vehicle travels 50 kilometers per hour and B vehicle 40 kilometers per hour. When a vehicle meets B vehicle, a vehicle travels 40 kilometers more than B vehicle. The distance is calculated
- 8. Car a and car B start from the East and west at the same time and travel in opposite directions. Car a travels 48 kilometers per hour and car B 42 kilometers per hour. The two cars meet 21 kilometers from the midpoint to find the distance between the East and the West______ Kilometers
- 9. A and B run from a and B at the same time. The two cars meet at 50 kilometers from the midpoint. A travels 30 kilometers per hour, B travels 20% more than a
- 10. A and B cars run from AB to each other at the same time. A car travels 48 kilometers per hour, B car travels 50 kilometers per hour. When they meet, B car travels 10 kilometers more than a car. How many kilometers is the distance between AB and B
- 11. A and B start from AB and run in opposite directions at the same time. A runs 40 kilometers per hour and B 35 kilometers per hour. The two cars meet at 15 kilometers from the midpoint B how many kilometers are there between the two places? Solve by equation
- 12. The first time they met at a distance of 7 km from B After meeting, they continue to drive forward. When they arrive at their destination, they return immediately. When they return, they meet at a distance of 4km from A. how many kilometers is the distance between a and B?
- 13. The speed ratio of the two vehicles is 7:11. After the first meeting, the two vehicles continue to move in the same direction and reach the destination respectively Return immediately after the end. When the second meeting, car a is 80 kilometers away from B. how many kilometers are there between a and B?
- 14. Party A and Party B face each other from a and B, and the speed ratio is 7:4. After the first meeting, they continue to move forward and return to the destination immediately. On the way, they meet for the second time. The second meeting is 10 meters away from A. how far is the distance between the two places?
- 15. Party A and Party B are facing each other from a and B at the same time. The first time they meet is 40 kilometers away from A. after meeting, they still advance at the same speed, return to the destination immediately, and meet again at 20 kilometers away from A. how many kilometers is the distance between a and B?
- 16. When car a runs 80% of the whole journey and car B is 20 km away from 70% of the whole journey, the distance between the two cars is 40 km. How many meters is the distance between car a and car B?
- 17. The speed of car a is 80% of that of car B. when car a meets car B, it travels 24 kilometers less than that of car B. when car B meets car a, it travels several thousand meters
- 18. 2. (5 points) if a batch of military materials is transported by 8 large trucks, it can be transported in 3 days. If it is transported by 5 small trucks, 25% of the total can be transported in 8 days. Now, 3 trucks are used
- 19. a. B two places meet for 1200 kilometers, and a and B two cars leave from two places at the same time. After five hours, they are 150 kilometers apart, It is known that the speed ratio of car a and car B is 3:4. How many hours does it take car B to complete the whole journey
- 20. How big should a 1.88-meter person's hand be? Do you have any data? For example, how long is the middle finger and how far is the little thumb from the big thumb?