Question

A missile is fired for maximum range with an initial velocity of $20m/s$. If $g=10m/s^2$, the range of the missile is (in $m$)

• A. $20$
• B. $40$
  
• C. $50$
  
• D. $60$
  

Answer 1

The correct option is B $40$

$Range=\frac{u^{2}sin2\theta }{g}=\frac{20\ast 20}{10}=40m$

because $\theta ={90}^{\circ }$ for maximum range