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A stone is dropped into well of 20m deep...

A stone is dropped into well of 20m deep. Another stone is thrown downward with velocity v one second later. If both stones reach the water surface in the well simultaneously, v is equal to (g = 10ms-2) (A) 30ms -1 (B) 15ms -1 (C) 20ms -1 (D) 10ms -1

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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 stone is dropped into a well of "20m" deep."],[" Another stone is thrown downward with velocity 'v' "],[" one second later.If both stones reach the water "],[" surface in the well simultaneously,v is equal to "]