The task is to generate the correct answer for a given math problem.
--------
Question: 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 ?

Answer: 335 min


Question: Problem: how many diagonals does a polygon with 13 sides have , if one of its vertices does not connect to any diagonal ?

Answer: 54


Question: Problem: a certain rectangular crate measures 8 feet by 14 feet by 16 feet . a cylindrical gas tank is to be made for shipment in the crate and will stand upright when the crate is placed on one of its six faces . what should the radius of the tank be if it is to be of the largest possible volume ?

Answer:
6