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A boy throws a ball,B from top of tower down at velocity 20 m/s and another boy from the ground level of tower throws a ball,A up at 5m/sec.Height of tower is 100m.Find the time when balls will collide? Why time when B will meet A is t=distance/velocity.?
Dear student,Relative velocity of both the balls=Relative acceleration=Initail distance between them 100m.Hence time taken to collide=
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