Math CentralQuandaries & Queries


Question from Emd, a parent:

A cyclist & a jogger are 20 miles apart.
Cyclist goes 20 mph & jogger 7mph towards each other.
A fly starts on nose of cyclist & flies at 20 mph from cyclist to jogger &
back & forth until they meet.
How far has the fly travelled?

Hi Emd,

First ask yourself, how long does it take until the cyclist and jogger meet? The fly flies at 20 mph so how far does he fly in that time?


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