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A lead ball dropped into a lake from a d...

A lead ball dropped into a lake from a diving board 5 m above the water hits the water with certain velocity and then sinks to the bottom with the same constant velocity. If it reaches the bottom in 3s after it is dropped the depth of the lake is `(g = 10 ms^(-2))`

A

30 m

B

15 m

C

10 m

D

20 m

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The correct Answer is:
D
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