On a long horizontallymoving belt,a child runs to and fro with a speed 9km h^(-1) (with respect to the belt) between his father and mother located 50 m apart.The belt moves with sped of 4km h^(-1).For an observer on a stationary platform ,the speed of the child runing in the direction of motion of the belt is

On a long horizontallymoving belt,a child runs to and fro with a speed

1.	On a long horizontallymoving belt,a child runs to and fro with a speed 9km h^(-1) (with respect to the belt) between his father and mother located 50 m apart.The belt moves with sped of 4km h^(-1).For an observer on a stationary platform ,the speed of the child runing in the direction of motion of the belt is
Answer» 4 KM `h^(-1)` `5 km h^(-1)` 9 km `h^(-1)` 13 km`h^(-1)` ANSWER :D

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