Question

A boy completes one round of a circle radius r in 20 sec .the displacement to distance after 10 s is

Answer 1

Solution:-
A boy complete one round of a cirlcle radius r in 20sec.

In 20 second he complete one round.

So,in 10 seconds=
$= > \frac{20}{10} = \frac{1}{2}$
So,
In 10 second he will complete half of the circle.

Therefore,the displacement will be 2r.

Answer 2

Answer:

A boy completes one round of a circle radius r in 20 sec .the displacement to distance after 10 s is