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A ball is allowed to slide down over the...

A ball is allowed to slide down over the inclined plane `AB=10sqrt(2)m` of inclination angle `45^(@)` with vertical.After crosses point B, ball hits on the ground at point E.With reference to base of vertical line BM(=15m ) jerry at point C (for which MC=15m ) has decided to catch the ball just before hits the ground.To do so,he runs from his position C at the same instant as the ball crosses the point B .With what constant speed Mr.jerry will run?

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