Question

The maximum horizontal range of a projectile is 400 m. The maximum height attained by it will be

• A. 100 m
• B. 200 m
• C. 400 m
• D. 800 m

Answer 1

Answer: (A)

100 m

Answer 2

$R_{\max}$ [when $\theta = 45{^\circ}$]

So from the Relation $R = 4H\cot\theta$ ⇒ $400 = 4H\cot 45{^\circ}$

⇒ $H = 100m.$