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

Q: Problem: bob wants to run a mile in the same time as his sister . if bob ’ s time for a mile is currently 11 minutes 20 seconds and his sister ’ s time is currently 9 minutes 36 seconds , by what percent does bob need to improve his time in order run a mile in the same time as his sister ?

A: 15 
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Q: Problem: find the least number must be subtracted from 105829 so that remaining no . is divisible by 21 ?

A: 10
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Q: Problem: a rectangular farm has to be fenced one long side , one short side and the diagonal . if the cost of fencing is rs . 14 per meter . the area of farm is 1200 m 2 and the short side is 30 m long . how much would the job cost ?

A:
1680
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