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Party A and Party B ride from a and B to each other. It is known that the speed ratio of Party A and Party B is 2:3. Party A starts 15 minutes earlier than Party B. after 1 hour and 45 minutes, they meet Party B. at this time, Party A walks 6 kilometers less than Party B. find out the speed of Party A and Party B and the distance between two places
Let the speeds of a and B be 2x and 3x respectively
[1+(45/60)]*2x+6=[1+(45/60)-(15/60)]*3x
(45+60)*2x+360=(60+45-15)*3x
210x+360=270x
60x=360
x=6
A's speed: 2 * 6 = 12 km / h
B's speed: 3 * 6 = 18 km / h
The distance between ab: [1 + (45 / 60)] * 2 * 6 + [1 + (45 / 60) - (15 / 60)] * 3 * 6 = 48km
A: the speed of a is 12 km / h, and that of B is 18 km / h. The distance between AB and ab is 48 km
The speed of a is 12 km / h, and the speed of B is 15 km / h. A stops for 20 minutes due to a fault. At 10:30, a and B meet on the way. How many kilometers is the distance between AB2
8: 00-10:30 is 2.5 hours
20 minutes = 1 / 3 hour
（12+15）×2.5-12×1/3
=27×2.5-4
=67.5-4
=63.5km
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