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 :

Question

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 :, 25 m, 45 m, 35 m, 50 m

MARKS App · Accepted Answer

Time for particle to meet = t ' = S r e l S r e l = 20 10 = 2 sec Time taken by I s t particle to reach ground = 3 sec H = 1 2 g 3 2 = 45 m

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