Question: A man on a motorcyle is driving down the freeway at 1 0 0 km / hr as he passes a school bus moving in

A man on a motorcyle is driving down the freeway at 100 km/hr as he passes a school bus moving in the
same direction at 80 km/hr. A student throws a ball towards the back of the bus at 20 km/hr. What is the
velocity of the ball from the point of view of someone standing on the side of the road?

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