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

Q: Problem: find compound interest on $ 10000 at 15 % per annum for 2 years 4 months , compounded annually .

A: 3886.25
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Q: Problem: a cat chases a rat 6 hours after the rat runs . cat takes 4 hours to reach the rat . if the average speed of the cat is 90 kmph , what s the average speed of the rat ?

A: 36 kmph
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Q: Problem: the length of minute hand of a clock is 5.4 cm . what is the area covered by this in 20 minutes

A:
30.54
****