How many times more big cars than small ones

How many times more big cars than small ones

Small car: 60 (4-1) = 20
Cart: 20 × 4 = 80
Big car 80, small car 20!! Primary school questions?
If you can't do it directly, I'll teach you how to solve the equation
There are x small cars and 4x large cars
4x-x=60
x=20
20x4 = 80 (vehicle)
A: there are 80 big cars and 20 small cars.
There are 80 big cars and 20 small cars.
In the sixth grade, 200 people go out to visit by car. The rent of 30 people in the car is 400 yuan; the rent of 20 people in the car is 300 yuan. The principal uses 3000 yuan to rent the car and designs three schemes
The first type: full use of the car, 200 / 30 need 6.666 cars, rounded to 7,
The rent is 7 * 400 = 2800 yuan
The second type: all purpose car, 200 / 20 cars, 10 people,
The rent is 10 * 300 = 3000 yuan
The third type: use 6 medium-sized vehicles, carrying 6 / 30 = 180, rent 6 * 400 = 2400
Another car will take 20, just to finish, and the rent will be 300 yuan,
The total rent is 2400 + 300 = 2700,
The best solution is the third one
1。 3000 yuan is all used for cars, with 10 cars, 3000 is just used up
2。 If you use six cars, 180 people will be employed at a cost of 2400 yuan, and one car will be used for 20 people at a cost of 300 yuan
A total of 200 people, 2700 yuan
3。 If you use four medium cars, 120 people will be employed at a cost of 1600 yuan, and then four small cars with 80 people will be used at a cost of 1200 yuan
A total of 200 people, with 2800 yuan
1。 3000 yuan is all used for cars, with 10 cars, 3000 is just used up
2。 If you use six cars, 180 people will be employed at a cost of 2400 yuan, and one car will be used for 20 people at a cost of 300 yuan
A total of 200 people, 2700 yuan
3。 If you use four medium cars, 120 people will be employed at a cost of 1600 yuan, and then four small cars with 80 people will be used at a cost of 1200 yuan
A total of 200 people, with 2800 yuan
It is rich in content and various in color.
A freight yard has 76 tons of goods to rent a car for shipment, there are two options, big car 5 tons each time, each time the freight is 85 yuan, small car 3 tons each time, each time the freight is 60 yuan?
85 △ 5 = 17 yuan, 60 △ 3 = 20 yuan. That is to say, the transportation cost of big cars is cheaper, so we can rent more big cars for transportation under the condition of full load as far as possible. 76 = 14 × 5 + 3 × 2
At 8:00 a.m., a and B are facing each other at the same time. The distance between a and B is 36 kilometers at 10:00 a.m., and they continue to move forward. At 12:00 a.m., they are 36 kilometers apart. It is known that a walks 2 kilometers more than B every hour, so as to find the distance between a and B
Suppose a and B are XKM apart and B travels YKM per hour, then a Travels (y + 2) km per hour. According to the meaning of the question, we get 2 (y + y + 2) = x-364 (y + y + 2) = x + 36. Solving the equations, we get x = 108y = 17. A: the distance between a and B is 108km
Xiao Ming read a story book. On the first day, he read 25 pages, accounting for one eighth of the whole book. On the second page, he read 37.5%. How many pages are left?
Attention, one eighth!
Suppose: there are x pages in the book, X / 8 = 25, x = 200. The next day I read 200 x 37.5% = 75 pages,
Remaining: (200-25-75) = 100
So there are 100 pages left to read
From station a to station B, the bus will arrive in 5 hours, and the truck will arrive in 6 hours. The two cars will leave from the two stations at the same time. After 2 hours, what is the distance between the two cars?
If the distance is set as 1, the passenger car takes 2 / 5 and the freight car takes 1 / 3, so the distance is 1 - (2 / 5 + 1 / 3) = 4 / 15
At this time, the ratio of B to B is 24:3 and the ratio of a to B is 24:3
Let a 2x, B x,
（2x-24）/( x+24)=4/3
The solution is x = 84
A 168, B 84
If the flow direction of a river remains unchanged after two turns, the angle of two turns may be ()
A. First turn 50 degrees to the right, second turn 130 degrees to the left B. first turn 50 degrees to the left, second turn 130 degrees to the left C. first turn 50 degrees to the right, second turn 50 degrees to the right D. first turn 50 degrees to the left, second turn 50 degrees to the right
A. As shown in Figure 1, ∵ 1 = 50 °, 2 = 130 °, 1 ≠ 2, ∵ AB is not parallel to CD, so this option is wrong; B. as shown in Figure 2, ∵ 2 = 130 °, 3 = 180 ° - 2 = 180 ° - 130 ° = 50 °, ∵ 1 = 3 = 50 °, ∵ ab ‖ CD, but the direction is opposite, so this option is wrong; C. as shown in Figure 3, ? 2 = 50 °, 3 = 180 ° - 2 = 180 ° - 50 ° = 130 °, 1 ≠ 3, ? AB is not right D. as shown in Fig. 4, ∵ {1 =} 2 = 50 ° and ∵ ab ‖ CD, and the direction is the same, so this option is correct. So select D
Jingjing read a story book. On the first day, he read 21 pages more than one eighth of the book. On the second day, he read 6 pages less than one sixth of the book, with 172 pages left
How many pages are there in this book? Please write down what you want in each step
Suppose this book has x pages, that is, the number of pages read on the first day (1 / 8x + 21), and the number of pages read on the second day (1 / 6x-6)
X-（1/8X+21）-（1/6X-6）＝172
It is reduced to 17 / 24x = 187
X＝264
From city a to city B, it takes 8 hours for the bus and 14 hours for the train. These two trains travel for 4 hours at the same time, which part of the city does they travel? How fast does that train travel? (write the formula)
4/8=1/2 4/14=2/7 1/2>2/7
The passenger car runs 1 / 2 of the whole journey, and the freight car runs 2 / 7 of the whole journey