A projectile is fired at an angle of 30^...

A projectile is fired at an angle of `30^(@)` to the horizontal such that the vertical component of its initial velocity is `80m//s`. Its time of fight is `T`. Its velocity at `t=T//4` has a magnitude of nearly.

`200m//s`

`300m//s`

`140m//s`

`100m//s`

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