Question
A wheel has a 12 inch radius rotating at 620 RPM. What is the speed of the car in MPH?
Answers
Reiny
circumference = 24π inches
so speed = 24π(620) inches/min
= 14880π/(12(5280)) miles/min
= 14880π/(12(5280)) miles/ (1/60) hrs
= 44.27 mph
check my arithmetic
so speed = 24π(620) inches/min
= 14880π/(12(5280)) miles/min
= 14880π/(12(5280)) miles/ (1/60) hrs
= 44.27 mph
check my arithmetic