Question

The length of second's hand of a clock is 8 cm. The
speed of tip of second's hand is :
(A) 0.48 cm/s (B) 0.64 cm/s
(C) 0.84 cm/s (D) 0.96 cm/s​

Answer 1

length = 8cm

distance covered by the second hang in a minute=2πr =50.24 cm

speed = distance/time

(50.24 )/60

= 0.83cm it's equal to (C)

answer is (C)