Question

It was known that a shell fired with a given velocity and at an angle of projection 5π/36radian can strike a target but a hill was found to obstruct its path. The angle of projection to hit the target should be

• A. Data is insufficient
• B. 13π/16 radian
• C. 10π/36radian
• D. 23π/26radian

Answer 1

Answer: (B)

13π/16 radian

Answer 2

The other angle of projection for the same range is

90^o- θ.

i.e., $\frac{\pi}{2} - \frac{5\pi}{36} = \frac{13\pi}{16}radian$