Question

Pls answer fast. I will mark you as brainliest answer.

Answer 1

Solution: Total time t = 2.8 s

Total distance d = 0.25 X 8 m (As length of table is 0.25m and pulse completes its 4 to and fro journey).

Speed = Distance / time

= 0.25 X 8 / 2.8

= 0.714 m/s