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Question

A mortar having muzzle velocity $v_{0} = 215.$ m/s fires for maximum range across a level plain. Neglecting air resistance. The time of flight of the shell is ______sec.

31

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Solution

The correct option is A 31
Time of flight

$t = \frac{2 v_{0}}{g} s i n α = \frac{2 v_{0}}{g} s i n 45$

$= 31.1$ sec

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