Question

a girl swim
along the length of 80m in swimming pool and comes back in 105 second find the distance covered and displacement

Answer 1

Well first of all thank you for for the question;

This question is good because it clearly differentiates between distance and displacement

Now,

The girl goes back and forth;

So,

The net distance = 80 + 80

=160 m

For displacement;

Net displacement = Final point - initial point

Since the final point and the initial points are the same

Displacement = 0

So, the distance covered is 160m and the displacement is 0 m

Answer 2

As the total length of the pool is 80 cm, therefore the distance covered by the girl in order to come back after swimming will be 80 + 80 = 160 m.

Displacement is the net shift in the motion of the girl in course of the swimming which can vary depending upon the speed.