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A particle is projected with certain vel...

A particle is projected with certain velocity at two different angles of projections with respect to horizontal plane so as to have the same range 'R' ona horizontal plane. If`'t_1'` and `'t_2'` are the times taken for the two paths, then which one of the following relations is correct?

A

`t_1t_2=2R/g`

B

`t_1t_2=R/g`

C

`t_1t_2=R/2g`

D

`t_1t_2=4R/g`

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