Question

Chapter Motion in a straight line.
Class XI CBSE

Answer 1

Answer:

Distance covered = Circumference of cirlce = 2*pi*r

Distance covered in 1 round = 2 * 3.14 * 7 = 44m

In 40 seconds == 44m is covered

So, in 90 seconds == (90 * 44)/40

= 99m

In 1 round displacement will be 0 (Initial and starting position is same)

So, in the remaining 50 seconds, distance covered is 55 m.

Distance - 99m

Displacement - 55m