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After time t, the height y of a projecti...

After time t, the height y of a projectile is `Y = 8t -5t^2` and horizontal distance x = 6 t if `g = 10m//s^2` the velocity of the projectile at the instant is

A

8 m `s^-1`

B

10 m `s^-1`

C

6 m `s^-1`

D

4 m `s^-1`

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The correct Answer is:
B
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