Diego is playing basketball. While running at 7 kilometers per hour toward Gino, he passes the ball to Gino horizontally. The ball travels at 20 kilometers per hour relative to Diego. What is the speed of the ball relative to Gino?

Assuming Gino is standing still, Diego and the ball move in the same direction toward him. Add the ball’s 20 kilometers per hour relative to Diego to Diego’s 7 kilometers per hour: 20 + 7 = 27 kilometers per hour. The ball’s speed relative to Gino is 27 kilometers per hour.

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