A stone dropped from a building takes 4 ...

A stone dropped from a building takes 4 s to reach the ground. The height of the building is

`78.4` m

`64` m

`260` m

`2000` m

Text Solution

Verified by Experts

The correct Answer is:

`x=(1)/(2)"gt"^(2)`
`=(1)/(2)xx9.8xx(4)^(2)`
`=4xx9.8xx2`
`=9.8xx8`
`=78.4` m

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