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

Example Input: 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 ?
Example Output: 335 min

Example Input: Problem: a jeep takes 9 hours to cover a distance of 480 km . how much should the speed in kmph be maintained to cover the same direction in 3 / 2 th of the previous time ?
Example Output: 35 kmph

Example Input: Problem: the triplicate ratio of 2 : 4 is ?
Example Output:
1 : 8