A and B drive from a to B at the same time. A car travels 80 kilometers per hour and 72.5 hours per hour A and B two cars drive from a to B at the same time. A car travels 80 kilometers per hour and 72 thousand 2.5 hours later, a car arrives at B. at this time, how many kilometers is B away from B

A and B drive from a to B at the same time. A car travels 80 kilometers per hour and 72.5 hours per hour A and B two cars drive from a to B at the same time. A car travels 80 kilometers per hour and 72 thousand 2.5 hours later, a car arrives at B. at this time, how many kilometers is B away from B

also
（80-72）x2.5
=8x2.5
=20 km
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Party A and Party B travel from place a to place B at the same time. Party A travels 80 kilometers per hour by car, and Party B travels 72 kilometers per hour by motorcycle. As a result, Party A arrives 15 minutes earlier than the scheduled time, while Party B is 10 minutes late. What is the distance between a and B?
In a hurry!

(T-15 / 60) * 80 = 72 * (T + 10 / 60) (T-15 / 60) * 80 = 300 km

Car a and car B run in opposite directions from two places. Car a travels 75 kilometers per hour, and car B 69 kilometers per hour. After car a leaves for two hours, car B leaves. After another three hours, the two cars meet. How many kilometers is the distance between the two places?

75 × 2 + (75 + 69) × 3, = 75 × 2 + 144 × 3, = 150 + 432, = 582 (km); a: the distance between the two places is 582 km

The speed of car a per hour is 1.25 times that of car B. after 3.5 hours, when car a reaches the midpoint, car B is 70 kilometers away from the midpoint. What are the speeds of car a and car B respectively?

The distance between the two places: 70 ^ (12-12 ^ 1.25), = 70 ^ (12-25), = 70 ^ 110, = 700 (km); a speed: 700 × 12 ^ 3.5, = 350 ^ 3.5, = 100 (km); B speed: 100-70 ^ 3.5, = 100-20, = 80 (km)