Question

A point on the edge of a fan blade that is rotating in a plane is 10 centimeters from the center of the fan. What is the distance traveled, in centimeters, by this point in 15 seconds when the fan runs at the rate of 300 revolutions per minute?

Answer 1

= 23, 561. 945 cm

Explanation:

If the fan does 300 rev per min;

300 rev : 60 sec

x rev : 15 sec

x = 300 * 15 / 60

x = 75 rev

One revolution of the point on the blade is equal to the circumference of the circle with a radius of 10 cm. Therefore;

2πr

2* 3.14 * 10

= 62.83 cm

75 revolution will be;

75 * 62.83 cm

= 4712.39 cm