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

Q: Problem: audrey 4 hours to complete a certain job . ferris can do the same job in 3 hours . audrey and ferris decided to collaborate on the job , working at their respective rates . while audrey worked continuously , ferris took 5 breaks of equal length . if the two completed the job together in 2 hours , how many minutes long was each of ferris ’ breaks ?

A: 6
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Q: Problem: by selling an article at rs . 600 , a shopkeeper makes a profit of 25 % . at what price should he sell the article so as to make a loss of 25 % ?

A: s . 360
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Q: Problem: what is the smallest integer k for which 64 ^ k > 4 ^ 17 ?

A:
6
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