Math CentralQuandaries & Queries


Question from musliu, a student:

Two buses leave a bus station and travel in opposite direction from that same starting point.if the speed of one is twice the speed of the other and they are 240km apart at the end of 1h, what is the speed of the buses?

Hi Musliu,

The key to this problem is that rate is distance divided by time.

Suppose the slower bus travels at $s$ miles per hour. What is the speed of the faster bus? At what rate are the busses moving apart? At this rate they are 240 miles apart in 1 hour. Solve for $s.$

Check your answer.


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