The task is to generate the correct answer for a given math problem.

Q: Problem: a hiker walking at a constant rate of 4 kilometers per hour is passed by a cyclist travelling in the same direction along the same path at a constant rate of 30 kilometers per hour . the cyclist stops and waits 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: 32.
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Q: Problem: the average age of 10 men is increased by years when two of them whose ages are 21 years and 23 years are replaced by two new men . the average age of the two new men is

A: 3
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Q: Problem: the compound ratio of 5 : 1 , 3 : 1 and 2 : 5 ?

A:
6 : 1
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