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Please!!! Prep2-37

Anyone can help me? Thanks!

37.A hiker walking at a consant rate of 4 miles per hour is passed by a cylist traveling in the same direction along the same path at a constant rate of 20 miles per hour. The cyclist stops to wait for the hiker 5 minutes after passing her, while the hiker continues to walk at her constant rate. How many minutes must the cyclist wait until the hiker catches up?
A. 6 2/3
B. 15
C. 20
D. 25
E. 26 2/3

The answer is C.

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