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BALLS ARE DROPPED FROM THE ROOF OF A TOWER AT A REGULAR FIXED INTERVAL OF TIME.AT THE MOMENT WHEN NO 9 BALL REACHES THE GROUND , THE NO n BALL IS 3/4 HEIGHT OF TOWER.FIND n. SIR,PLEASE EXPLAIN THIS QUESTION BRIEFLY BECAUSE I ALWAYS FIND THESE KIND OF QUESTIONS DIFFICULT. THANKS RGS

BALLS ARE DROPPED FROM THE ROOF OF A TOWER AT A REGULAR FIXED INTERVAL OF TIME.AT THE MOMENT WHEN NO 9 BALL REACHES THE GROUND , THE NO n BALL IS 3/4 HEIGHT OF TOWER.FIND n.


SIR,PLEASE EXPLAIN THIS QUESTION BRIEFLY BECAUSE I ALWAYS FIND THESE KIND OF QUESTIONS DIFFICULT.


THANKS


RGS

Grade:11

1 Answers

Saurabh
15 Points
4 years ago
Let h be the total height of the tower 
 
h= 1/2×g(9-1)^2.t^2 ......(1)
h=1/2×g(n-1)^2.t^2 ........(2)
Solve equations 1 & 2.

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