instruction:
The task is to generate the correct answer for a given math problem.
question:
Problem: the diameter of the driving wheel of a bus in 140 cm . how many revolutions per minute must the wheel make in order to keep a speed of 33 kmph ?
answer:
125

question:
Problem: if the sides of a cube are in the ratio 5 : 3 . what is the ratio of their diagonals ?
answer:
5 : 3'

question:
Problem: at what rate percent per annum will a sum of money double in 6 years .
answer:
16.6