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This is waves problem. Explain the answer. Answer is 2nd option.

This is waves problem.
Explain the answer.
Answer is 2nd option.
 

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1 Answers

Khimraj
3007 Points
2 years ago
time taken by stone to reach in water 
t1 = \sqrt{2h/g} = \sqrt{2*300/9.8} = 7.82 s
time taken by splash to reach at top of tower
t2= h/v = 300/340 = 0.88 s
So total time = t1 + t2 = 8.7 s
Hope it clears. If you like anser then please approve it.

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