A waterwheel in a watermill has a radius of 7 ft and makes a

A waterwheel in a watermill has a radius of 7 ft and makes a complete revolution in 70 sec. What is the linear speed, in feet per minute, of a point on the rim?

Solution

time period of one revolution =70sec =70/60=(7/6)min

distance covered in one revolution =2*7=14 ft

linear speed =(14)/(7/6)

linear speed =14*6/7

linear speed =12

linear speed =37.7 feet/min