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A stone is thrown vertically up at 20 m/...

A stone is thrown vertically up at 20 m/s from a tower 80 m height. The speed with which it hits the ground is `[g=10m//s^(2)]`.

A

`14.4m//s`

B

`28.14m//s`

C

`80m//s`

D

`sqrt(5)20m//s`

Text Solution

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The correct Answer is:
D
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