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The Answer should be part B
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C is the answer hope this helped u if u want steps to prove ask in comment section
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Horizontal distance covered by ball =nb
Vertical distance covered by ball =nh
If the time taken to hit the edge of nth step is t, then
Vertical distance covered by ball =nh
If the time taken to hit the edge of nth step is t, then
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Vertical distance covered by ball =nh
If the time taken to hit the edge of nth step is t, then
nb=ut
nh=12gt2
Eliminating t, we get,
nh=12g(nbu)2
n=2hu2gb2