Question

the length of minute hand of a clock is 20cm.find the area swept by minute hand in 5 minutes. (π=3.14)​

Answer 1

Answer:

In 20 minutes, the minute hand swept one-third of the area of the clock.

Therefore, the area swept by the minute hand in 20 minutes is

=

3

1

π.(9)

2

=27π

=27×3.14

=84.78

Answer 2

Answer:

Area of Sector = Angle formed at the centre ÷ 360× πr^2

Here, Radius= Length of clock hand = 20 I'm

Angle formed by minute hand in one minute = 6 degree

Therefore, angle formed by minute hand in 5 minutes = 6×5 = 30 degree

Area= 30÷360 × 3.14 × 20 ×20 cm^2

=104.67cm^2