Question

The seconds hand of a watch is 2 cm long.The displacement of the tip of the hand in 15 seconds is
a)0.5 cm
b)1.0 cm
c)6.28 cm
d)3.14 cm

It's urgent....

Answer 1

3.14

1/4 x 2 x 3.14 x 2

so answer is 3.14

Answer 2

Answer:

3.14 cm

Explanation:

its because.....

You get distance traveled by the tip of the seconds hand by

= 2*pi*r

=88/7

as 1min= 60sec

speed = 88/(7*60)

= 0.21/sec

d=s*t

so, 0.21*15 = 3.14cm