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Questions  

The equation of projectile is  Y=3X-12gX2 The  velocity of projection is

a
1 ms-1
b
2 ms-1
c
3 ms-1
d
1.2 ms-1

detailed solution

Correct option is B

Comparing with  y=xtanθ-gx22u2cos2θ we havetanθ=3 or θ=60° and u2cos2θ=1or           u=secθ=sec60°=2 ms-1

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