Question

The length of the minute hand of a circle is 42 cm find the area swept by the minute hand in 20 minute

Answer 1

Answer:

1848 cm square units

Area of a full circle with radius 42cm with 360 degree=

(22/7)x42x42  ==5544 cm square units.

Angle covered by minute hand in 20 minutes = 120 degree

so the required angle ===5544 x 120 /360

                                      ====1848 cm square units