A and B bicycled from two places 66 kilometers apart. It is known that a travels 3 km more per hour than B. after meeting each other for 2 hours, the speed of a and B is calculated Solve by equation
Let the velocity of a be x + 3 and that of B be X
(x+x+3)*2=66
x=15
A speed is 18, B speed is 15
Party A and Party B ride from both places at the same time. Party A travels 20 kilometers per hour, and Party B travels 18 kilometers per hour. When they meet, the distance between them is 3 kilometers from the midpoint of the whole journey. How long is the whole journey? (draw a picture first, then answer)
3 × 2 (20-18) = 6 △ 2 = 3 (hours); (20 + 18) × 3 = 38 × 3 = 114 (kilometers); answer: the whole journey is 114 kilometers long
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