A body is projected at angle 30° to hori...

A body is projected at angle 30° to horizontal on a planet with a velocity of 80 `ms^(-1)` its time of flight is 4 seconds then acceleration due to gravity on that planet is

A

`2ms^(-1)`

B

`5 ms^(-2)`

C

`10 ms^(-2)`

D

`20 ms^(-2)`

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The correct Answer is:

D

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