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

It's 3.14 cm because the it travels a distance of 1 fourth of the circle and the circle having circumference or perimeter is 2×pi×r.

so it will be 2×pi×r/4

and the value of r = 2cm.

and pi = 3.14