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As shown in the figure is the functional relationship between the vehicle speed V and time T. If we look at the distance s of the vehicle in this process as a function of time As shown in the figure is the functional relationship between the vehicle's speed V and time T. If we look at the vehicle's distance s in this process as a function of time t, the image may be ()
No picture, no true image
A car goes from a to B at the speed of 30 kilometers per hour. Four hours later, a train goes from a to B. the speed of the train is three times that of the car. It catches up with the car at half the distance between a and B. how many kilometers are there between a and B?
30 × 4 ^ (30 × 3-30) × 2, = 30 × 4 ^ 60 × 2, = 120 ^ 60 × 2, = 2 × 2, = 4 (hours); 30 × 3 × 4, = 90 × 4, = 360 (kilometers); answer: the distance between a and B is 360 kilometers
A car goes from place a to place B at the speed of 30 kilometers per hour. Four hours later, a train goes from place a to place B at the speed of 90 kilometers per hour. At the middle point of the two places, the train catches up with the car and asks the distance between the two places______ Kilometers
30 × 4 ÷ (90-30) × 2, = 30 × 4 ／ 60 × 2, = 120 ／ 60 × 2, = 2 × 2, = 4 (hours); 90 × 4 = 360 (kilometers); answer: A and B are 360 kilometers apart
A car drives from a to B at the speed of 30 kilometers per hour. Four hours later, a train goes from a to B. the speed of the train is three times that of the car. How many kilometers is the distance between a and B
The distance between a and B is s km
According to the time relationship of pursuit, there are:
s/2÷90=（s/2-30x4）÷30
The solution is s = 360
The distance between a and B is 360 km
I hope I can help you
A car at 45 kilometers per hour from a to B, leaving four hours later, a train from B to a
The speed of this train is twice as fast as that of this car. At a distance of 450 kilometers from B, the train and the car meet. How many kilometers is the distance between a and B?
45*2=90 4*45=180
180÷（90-45）
=180÷45
=4 (hours)
4*90+180+450
=360+180+450
=540+450
=990 (km)
A: 990 km
Should be right, give some hard points!
A car goes from a to B at the speed of 30 kilometers per hour. Three hours later, a train goes from a to B at the speed of 2.5 times that of a car
How many kilometers is the distance between a and B?
{(30×3)÷[30×(2.5-1)]+3}×30÷1/2=300(km)
The distance between a and B is 160km. A starts from a place 20km / h by bicycle. B starts from B by motorcycle three times faster than A. how long does it take for them to meet each other
First calculate the velocity of B 20 * 3 = 60 160 divided by (20 + 60) = 2
The distance between a and B is 128 kilometers. One person starts from a place by bicycle, 16 kilometers per hour, and the other person starts from B place by motorcycle,
Two people are walking towards each other at the same time. It is known that the speed of motorcycle is three times that of bicycle. How many hours later will two people meet? (solve the equation, I need it urgently.)
Let's meet in X hours
X*(16+16*3)=128
64X=128
X=2
Meet in two hours
The distance between a and B is 160km. A starts from a by bike with a speed of 20km / h. A starts from B by motorcycle with a speed three times that of A
Two people set out at the same time, facing each other. Seek the distance between the two cities
I've just finished this problem and I'm still checking the answer
Excuse me for my incompetence ]
Let's meet through XH
According to the meaning of the title: 20x + 20 * 3x = 160
The solution is: x = 2
A: after two hours
The distance between Party A and Party B is 48km. The ship flows downstream from Party A to Party B, and immediately reverses from Party B to Party A for 9h. It is known that the water velocity is 4km / h. The ship's velocity in still water can be calculated
Let the ship pass through the still water for 12 km / h. from the solution of the equation, we can get: 48 ^ (x + 4) + 48 ^ (x-4) = 9 solution, we can get: x = 12 ^. Through the test, x = 12 is the solution of the original equation, and conforms to the meaning of the problem. Answer: the ship is in the still water for 12 km / h
RELATED INFORMATIONS
- 1. A ship from a downstream 9 hours to B, the original way back 11 hours to reach a, known water velocity is 2 km / h, find the ship's speed in still water The distance between a and B
- 2. One car drove 160km from place a to place B, which is exactly 4 / 7 of the whole journey. The other car drove 1 / 4 of the whole journey from place B to place a How many kilometers did a and B get together? How many kilometers did the second car travel?
- 3. A car drove from place a to place B at a speed of 90 km / h for 3 hours, just half of the whole journey. How many kilometers are there between the two places
- 4. The distance between a and B is 160 kilometers. A car travels 60 kilometers from a to B in 3 / 4 hours. At this speed, how many hours does it take to complete the whole journey?
- 5. There are 540 kilometers from a to B. a car has been driving 60 kilometers per hour from a to B for two hours. How many hours will it take to reach B
- 6. The distance between a and B is 504km. A car drives from a to B in 6 hours. How many hours will it take to reach B at this speed? (solve by proportion)
- 7. The distance between a and B is 504km. A car drives from a to B in 6 hours. At this speed, it takes several hours to reach B (solve by proportion)
- 8. Solving the equation: at 8 a.m., a car drove 40 kilometers from a to B in the first hour, one hour later than the original plan, so it drove at a speed of 50 kilometers per hour At 8 o'clock in the morning, a car drove 40 kilometers from a to B in the first hour. At this speed, it was one hour later than the original plan. So it drove at 50 per hour, one hour earlier than the original plan. How long was the original plan
- 9. At 8:00 in the morning, a car drove 40 kilometers from place a to place B in the first hour. At this speed, it was one hour later than the original plan. So, the driver changed to drive at the speed of 50 kilometers per hour, and the result was one hour earlier than the original plan. How long is the highway between a and B?
- 10. The distance between a and B is 264km. The time ratio of freight cars and buses from a to B is 5:6. Freight cars and buses run from a and B at the same time. After 1.5 hours, the two cars meet. How many kilometers do the two cars travel when they meet
- 11. A driver drives a car from area a to area B and arrives at the destination in 6 hours at an average speed of 80 km / h (1) When he returns on the original road, he finds the functional relationship between the time t (H) to reach Jiadi and the vehicle speed V (km / h) (2) If the driver returns at a constant speed, use 4.8h to calculate the return speed
- 12. The distance between Party A and Party B is 420 kilometers. Two cars drive from Party A to Party B at the same time. The first car runs 42 kilometers per hour, and the second car runs 42 kilometers per hour 28km, the first car to B immediately back and forth, how many hours do two cars share from departure to meet?
- 13. The distance between a and B is 600 km, and a car travels 240 km in 3 hours. According to this calculation, how many hours does it take to complete the journey
- 14. The original plan was to travel 80 kilometers per hour, but actually 20 kilometers more than the original plan How many meters is the distance between a and B?
- 15. A car can travel 80 km / h on the expressway from place a to place B. the driver estimates that if the speed is increased by 20%, it will take 0.5 hours more, Find the distance between a and B; can the answer be without equations
- 16. A car goes from place a to place B at the speed of 60 km / h. When the car runs for 4.5 hours, the road is slippery in the rain, and the speed is reduced by 20 km / h Arrive at place B 3 / 4 hours later. Find the distance between Party A and Party B
- 17. A and B are going from a and B at the same time. They meet at 5 o'clock. The speed ratio of a and B is 5:4. A is 60km per hour and ab is several km apart
- 18. On a map with a scale of 1:6000000, the distance between a and B is 25cm. A plane flies from a to B at 8:30 a.m. and arrives at 9:45 a.m?
- 19. The distance between the two places is 259km. The passenger cars and freight cars start from the two places at the same time and run in opposite directions. The freight cars run 36km per hour, and the passenger cars run 38km per hour. How long will it take for the two cars to meet after 2 hours?
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