Question

A father walks 36 miles in 12 hours while his son covers the same distance on a bicycle at twice the father's rate of speed. at this rate, how many miles would the bicycle rider travel in 9 hours?

Answer 1

36/12=3 mph
2(3) mph=6 mph
6 mph x 9 hours=54 miles covered by the son
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Answer 2

54 miles

Explanation:

`v_(father)=36 miles / 12 hours = 3 miles/hours`

`v_(son)= v_(father)*2 = 3 miles/hour * 2 = 6 miles/hour`

`d=vt\\d=6miles/hour * 9 hours \\d=54 miles`