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

raju nagula , 6 Years ago
Grade
anser 1 Answers
Khimraj

Last Activity: 6 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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