Question:
A helicopter is flying horizontally with a speed ' $v$ ' at an altitude 'h' has to drop a food packet for a man on the ground. What is the distance of helicopter from the man when the food packet is dropped?
Correct Option: , 3
Solution:
$R=\sqrt{\frac{2 h}{g}} \cdot v$
$\mathrm{D}=\sqrt{\mathrm{R}^{2}+\mathrm{h}^{2}}$
$=\sqrt{\left(\sqrt{\frac{2 h}{g}} \cdot v\right)^{2}+h^{2}}$
$D=\sqrt{\frac{2 h v^{2}}{g}+h^{2}}$
Option (3) is correct