SOLUTION: A rock falls from a tower that is 73.5 m high. As it is falling, its height is given by the formula with t in seconds. How many seconds will it take for the rock to hit the ground

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Question 264329: A rock falls from a tower that is 73.5 m high. As it is falling, its height is given by the formula with t in seconds. How many seconds will it take for the rock to hit the ground (h = 0)?
Answer by mananth(16946) About Me  (Show Source):
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A rock falls from a tower that is 73.5 m high. As it is falling, its height is given by the formula with t in seconds. How many seconds will it take for the rock to hit the ground (h = 0)?

t= sqrt(2d/g)
t= sqrt( 73.5/9.80)
t= sqrt 15
=3.87 seconds