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

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

It takes x hours to complete the whole journey
240：3=600：x
The solution is x = 7.5 hours

A and B are running on the 7 km long ring road. A runs 200 meters per minute, B 150 meters per minute,
(1) How long does it take for two people to meet for the first time if they set out on the same ground and in the opposite direction at the same time?
(2) If two people set out in the same direction at the same time, how long will it take for them to meet for the first time?

(1) Let's meet in X minutes
（200+150）x=7000
x=20
That is: after 20 minutes
(2) We met in X minutes
200x=7000+150x
50x=7000
x=140
That is: after 140 minutes

Party A and Party B are running on the 7 km long ring road. Party A runs 200 meters per minute and Party B 150 meters per minute. If they set out on the same ground and in the opposite direction at the same time, how long will it take for them to meet for the first time?
If two people set out in the same direction at the same time, how long will it take for them to meet for the first time?

Love morning baby's orange,
7 km = 7000 m
How long does it take for two people to meet for the first time if they set out on the same ground and in the opposite direction at the same time?
7000 (200 + 150) = 20 (minutes)
If two people set out in the same direction at the same time, how long will it take for them to meet for the first time?
7000 (200-150) = 140 (min)

A and B are running on a 10km long ring road. A's speed is 230m / min, B's speed is 17om / min
(1) If two people set out in the same direction at the same time, how many minutes will they meet for the first time?
(2) If two people set out at the same time, how many minutes will they meet for the first time?

A and B ran on the ring road. A ran a circle in 18 minutes and B ran a circle in 12 minutes
If a runs 3 minutes ahead of time, how many minutes does it take B to catch up with a?
Why divide 1 by 6

6 primary school application questions?
Supplement:
Suppose that the total length of the ring road is 1 and the time is t, the time used for both is equal
(1/12)*t=(1/18)*3+(1/18)*t
t=6

How do you do, teacher? I'd like to ask you to ride a bike and run B. they start from the same point at the same time and train in the same direction along the 4 km long circular road. Ten minutes after starting,
A catches up with B from behind B. It is known that the sum of their speed is 700 meters per minute. What's the speed of a and B?

Let a's speed be x meters, then B's speed is 700-x meters. If a overtakes B, it's a lap of 10x-10 × (700-x) = 4000 10x-7000 + 10x = 4000 x = 550 700-550 = 150 meters

The whole length of Neijiang Chengdu section of Chengyu road is 170 km. A car and a bus run from Neijiang to Chengdu at the same time. After meeting each other in 1 hour and 10 minutes, the car runs 20 km more than the bus. Suppose the average speed of car and bus is x km / h and y km / h

One hour 10 minutes = 70 minutes
70x-70y=20
70x+70y=170

The whole length of Neijiang Chengdu section of Chengyu road is 170 km. A car and a bus run from Neijiang and Chengdu at the same time. After meeting in 1 hour and 10 minutes, the car runs 20 km more than the bus

Equivalent relationship: ① the distance of a car minus the distance of a bus equals 20km
② The total distance of the two vehicles is 170km
The equations are as follows: ① x · 1 and 1 / 6 (it's not easy to write, it's OK to read it clearly) - y · 1 and 1 / 6 = 20
② X · 1 and 1 / 6 + y · 1 and 1 / 6 = 170

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 travels 42 kilometers per hour, and the second car travels 42 kilometers per hour
Travel 28 kilometers, the first car to B immediately return, two cars from the beginning to meet how many hours?

420 * 2 / (42 + 28) = 840 / 70 = 12 hours

A car from a to B, after a distance, there are 420 kilometers away from B, and then another line of 1 / 5 of the whole distance, at this time, it's over
The ratio of driving distance to non driving distance is 3:2. How many kilometers is the distance between a and B?

420 ÷ (3 / 5-1 / 5) = 1050 km
A: the distance between a and B is 1050 km