Question

The minute hand of a clock is 6 cm long.The area swept by it between 11:20 am and 11:55 am is a) 36cm² b) 66 cm² c)60 cm² d) 96 cm²

Answer 1

Area of Clock = πr^2

= 22/7 × 6 × 6 = 113.1428 sq.cm

Area swept by One Minute = 113.1428/60

= 1.8857 sq.cm

No. of Min.s from 11:20 to 11:55 = 35 Min

Area swept by 35 Min.s = 35 × 1.8857

= 66 sq.cm

Therefore, area swept between 11:20 to 11:55 = 66 sq.cm