Question

A circular clock has a minute hand measuring 12 inches long. how far, in inches, does the outermost tip of the minute hand travel in 20 minutes?

Answer 1

The distance covered by the minute hand in 60 minutes = circumference of the circle of radius 12 inches.

Now the distance covered in 20 minutes will be 1/3 of the circumference.

= 1/3*2*pi*r
=2/3*pi*12
=8*pi

Taking pi = 3.14

Distance covered by the minute hand in 20 minutes = 25.12 inches