Homework Help: math

Posted by Leslie on Wednesday, February 13, 2013 at 8:13pm.

the distance between town A and town B was 210km. At 9:20pm a bus sets off from town A to town B and a car left from town B to town A. The average speed of the bus was 60km/h and the average speed of the car was 80km/h.
a)Calculate the time at which the car passed the bus.
b)How far had the car traveled when it passed the bus?

math - Reiny, Wednesday, February 13, 2013 at 9:07pm
they both drove the same time, t hrs

so 60t + 80t = 210
140t = 210
t = 210/140 = 1.5

after 1.5 hrs, they met.
and that time was 9:20 + 1:30 = 10:50 pm

distance traveled by car = 1.5(80) = 120 km

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