A person in lift which ascents up with acceleration 10ms^(-2)drops a stone from a height 10m. The time of decent is ___ [g=10 ms^(-2)]

A person in lift which ascents up with acceleration 10ms^(-2)drops a s

1.	A person in lift which ascents up with acceleration 10ms^(-2)drops a stone from a height 10m. The time of decent is ___ [g=10 ms^(-2)]
Answer» 1s 2s 15m 20m Answer :A