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

Q: Problem: the ratio of the radius of two circles is 1 : 3 , and then the ratio of their areas is ?

A: 1 : 9
****
Q: Problem: a circular ground whose diameter is 70 metres , has a 2.8 metre - broad garden around it . what is the area of the garden in square metres ?

A: 640.64
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Q: Problem: on dividing a number by 48 , we get 29 as remainder . on dividing the same number by 8 , what will be the remainder ?

A:
5
****