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

[EX Q]: Problem: a tyre has two punctures . the first puncture alone would have made the tyre flat in 9 minutes and the second alone would have done it in 6 minutes . if air leaks out at a constant rate , how long does it take both the punctures together to make it flat ?
[EX A]: 335 min

[EX Q]: Problem: how many digits are required to number a book containing 240 pages ?
[EX A]: 612

[EX Q]: Problem: a wire in the form of a circle of radius 3.5 m is bent in the form of a rectangule , whose length and breadth are in the ratio of 6 : 5 . what is the area of the rectangle ?
[EX A]:
30 cm 2', 'c ) 76 cm 2', 'd ) 68 cm 2', 'e ) 46 cm 2'