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A stone is dropped into a well of 20 m d...

A stone is dropped into a well of 20 m deep. Another stone is thrown downward with velocity 'v' one second later. If both stones reach the water surface in the well simultan eously, v is equal to `(g = 10 ms^(-2))`

A

30 `"ms"^(-1)`

B

15 `"ms"^(-1)`

C

20 `"ms"^(-1)`

D

10 `"ms"^(-1)`

Text Solution

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The correct Answer is:
B
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