Please explain how to solve this equation

Question

A wind turbine has blades that are 75 meters long. It takes 5 seconds for the blades to make one complete revolution. To the nearest meter, how far does the exterior edge of a blade travel in 3 seconds? Write the numerical value only.

Answer 1

it seems you are looking for the arc length which is S since you were given the radius of 75m and since you ssted thatis takes 5 seconds for one whole revolution we can divide 360/5 to get 72 degrees and if we use the formula s=2pi x r(theta/180)->s=2pi x 75(72/180)->s=60pi or 188.5 so thats the arc length.