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 simultaneously, v is equal to (g=10ms^(-2))

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

1.	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 simultaneously, v is equal to (g=10ms^(-2))
Answer» `30 ms^(-1)` `15 ms^(-1)` `20 ms^(-1)` `10 ms^(-1)` Answer :B