Question

The minute hand on a watch is 14 millimeters. In the course of an hour, how much area does it cover? Leave answers in terms of π.

Answer 1

The area of a circle is A = πr^2 where in this case r = 14 mm as the length of the minute hand. Therefore over an hour, the minute hand covers the entire area of the circle with this radius, giving a value of:
A = π * 14^2 = 196π
Hope this helps!