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

[Q]: Problem: the volume of water inside a swimming pool doubles every hour . if the pool is filled to its full capacity within 8 hours , in how many hours was it filled to one quarter of its capacity ?
[A]: 6', 'e ) 7'


[Q]: Problem: find the cost of fencing around a circular field of diameter 16 m at the rate of rs . 3 a meter ?
[A]: 150.84


[Q]: Problem: what will be the cost of gardening 1 meter boundary around a rectangular plot having perimeter of 340 meters at the rate of rs . 10 per square meter ?
[A]:
rs . 3440', 'c ) rs . 3450', 'd ) rs . 3460', 'e ) rs . 3490'