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The distance between a and B is about 1100 kilometers. When does a train run 120 kilometers per hour and B train run 100 kilometers per hour
This problem can be solved by equation and formula. Equation: suppose two trains meet in X hours, then the equation can be: 100x + 120x = 1100. Merge the similar terms, get: 220x = 1100. Coefficient into one, get: x = 5. Answer: two trains meet in 5 hours. Formula: 1100 ÷ (100 + 120) = 1100 ÷ 220 = 5 (hour) answer: two fire
The two trains run in opposite directions. A travels 75 kilometers per hour and B 69 kilometers per hour. One hour after a leaves, B leaves, and two hours later
How long is the railway between the two places
75 × (1 + 2) + 69 × 2 = 363km
It's 363 kilometers away
The two trains run from 560 kilometers away from each other at the same time. They meet in 4 hours. The train a runs 68 kilometers per hour, and the train B runs how many kilometers per hour?
Please write carefully
Let B speed x 4 * 68 + 4 * x = 560 and x = 72, which is a little simple
The two trains a and B leave each other from the two places. It is known that the speed of a is 1.5 times that of B. after 4 hours, the two trains meet at a distance of 30 km from the midpoint,
What is the distance between the two places
Speed difference = 30 × 2 △ 4 = 15 km / h
B speed = 15 ÷ (1.5-1) = 30 km / h
A speed = 30 × 1.5 = 45 km / h
Distance = 4 × (30 + 25) = 300 km
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