A wheel made 160 revolutions at 17 13 revolutions per minute

A wheel made 160 revolutions at 17 1/3 revolutions per minute. How many minutes did it rotate?

Solution

Answer :

A wheel made 17 1/3 = 52/3 revolutions per minute.

If it completes 160 revolutions , then the tie taken by this wheel to complete 160 revolutions is

160/(52/3) = (160 x 3 ) / 52 = 480/52 = 9 3/13 minutes.

hence the wheel needs 9 3 /13 minutes to complete 160 revolutions.