On a long horizontally moving belt a child runs and fro with

Last updated: 6/8/2023

On a long horizontally moving belt a child runs and fro with a speed 9 kmh with respect to the be between his father and mother located 50 m apa on the moving belt The belt moves with a speed 4 km h For an observer on a stationary platfora the speed of the child running in the direction motion of the belt is a 4 km h c 9 km h b 5 km h d 13 km h