Question

The length of the minute hand of a wall clock is 4.2 cm find the area swept by it in 60 minutes

Answer 1

The minute hand moves in a circular path. In 60 minutes it completes a circle . So you have to find the area of a circle.

I think this is what the question contains

Answer 2

Explanation:

angle made in 20 min = 120 degree

area swept = (120 * 22 * 42 * 42)÷(360 * 7 * 10 * 10)

= 18.48 cm sq.