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A platform is pulled with horizontal acc...

A platform is pulled with horizontal acceleration a. A particle is projected from the platform at an angle `theta` with the horizontal with respect to the platform as shown in figure. The value of `tantheta` such that particle again come to the starting point on the platform is (`a` = `5 m s^-2` and `g` = `10 m s^-2`)

(1) 4

(2) 6

(4) 3

(3) 2

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