$A$ helicopter is flying horizontally with a speed $v$ at an altitude $h$ and has to drop a food packet for a man on the ground. What is the distance of the helicopter from the man when the food packet is dropped?
- A$\sqrt{\frac{2ghv^{2}+1}{h^{2}}}$
- B$\sqrt{2ghv^{2}+h^{2}}$
- C$\sqrt{\frac{2v^{2}h}{g}+h^{2}}$
- D$\sqrt{\frac{2gh}{v^{2}}}+h^{2}$
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