An airplane is flying at a height of $1960 \, m$ with a horizontal velocity of $360 \, km/hr$. When the airplane is directly above point $A$,a body is dropped from it. How much time (in $sec$) will it take for the body to reach the ground?
- A$20\sqrt{2}$
- B$20$
- C$10\sqrt{2}$
- D$10$
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