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A particle is dropped from height h = 10...

A particle is dropped from height `h = 100 m`, from surface of a planet. If in last `1/2` sec of its journey it covers 19 m. Then value of acceleration due to gravity that planet is :

A

`8 m/s^2`

B

`1/8 m/s^2`

C

`1/4 m/s^2`

D

`2 m/s^2`

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