Xiao Zhang and Xiao Wang started from location A by bike at the same time and walked in the same direction. Xiao Zhang drives 3 kilometers more per hour than Xiao Wang, and Xiao Zhang is better than Xiao Wang.
Xiao Zhang and Xiao Wang started from location A by bike at the same time and walked in the same direction. Xiao Zhang travels 3 kilometers more than Xiao Wang every hour, and Xiao Zhang passes through B place on the way one third earlier than Xiao Wang. When Xiao Wang arrived at B, Xiao Zhang advanced another 5 kilometers.
How many kilometers does Xiao Wang drive per hour?
(2) How many kilometers is there between A and B?
Solution, get:
(1) If the distance from A to B is X kilometers and Xiao Wang's speed is Y, then Xiao Zhang's speed is Y+3, and Xiao Wang's time to arrive at B is T, D,
yt==(y+3)(t- 1/3)
yt==(y+3)t-5
3yt+x-3yt-9t==0
9t-3-y==0 ( 1)
yt-yt-3t+5==0
3t-5==0
t==5/3
Bring t into (1)
15-3-y==0
y== 12
(2) The distance between A and B is: 12 * (5/3) = = 20km.
A: Xiao Wang's speed12km, and the distance between A and B is 20km.