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Questions  

The range of a projectile is R when the angle of projection is 40°. For the same velocity of projection and range, the other possible angle of projection is                    

a
450
b
500
c
600
d
400         900

detailed solution

Correct option is B

Range of projectile is same for θ and 90° - θ.Given, θ = 40°Another angle = 90° - θ = 90° - 40° = 50°

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