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The heighty (in metres) and distance X (...

The heighty (in metres) and distance X (in metres) along a horizontal plane of a projectile of earth are given by `x = 6t` and `y = (8t-5t^2)`, where t represents time in seconds. The velocity with which the projectile is projected is :

A

8m/s making angle `tan^(-1) (3//4)` with x-axis

B

6m/s making angle `tan^(-1) (4//3)` with X-axis

C

10 m/s making angle `tan^(-1) (4/3)` with x-axis

D

12 m/s making angle `tan^(-1) (4//3)` with x-axis

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