A stone is dropped from the top of a building. When it crosses a point 5   m below the top, another…

A stone is dropped from the top of a building. When it crosses a point 5 m below the top, another stone starts to fall from a point 25 m below the top. Both stones reach the bottom of building simultaneously. The height of the building is :
  1. 25 m
  2. 45 m
  3. 35 m
  4. 50 m

Solution

Time for particle to meet =t'=SrelSrel=2010=2 sec

Time taken by Ist particle to reach ground =3 sec

H=12 g32=45 m

Asked in: JEE Main 2021 (25 Feb Shift 2)

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