Question

an athlete runs along a circular track of radius 7m. he takes 40 minutes to go once find the displacement and distance travelled by him after 20 minutes ​

Answer 1

sorry sorry e i was getting a same point

Answer 2

Given: An athlete runs along a circular track of radius 7m. he takes 40 minutes to go once.

To find: We have to find the displacement and distance travelled by him after 20 minutes.

Solution:

The radius of the circular track is 7m.

The formula of perimeter of circle

$= 2\pi r$

So, the perimeter of the circular track is

$= 2 \times \frac{22}{7} \times 7 \\ = 44$

He takes 40 minutes to cover 44m.

Speed of him

$= \frac{44}{40} \\ = 1.1$

So, the distance travelled by him after 20 minute is

$= 1.1 \times 20 \\ = 22$

The displacement is 44m and distance travelled by him after 20 minute is 22m.