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Q.

A shot is fired from a point at a distance of 200 m from the foot of a tower 100 m high so that it just passes over it. The direction of shot is

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a

30°

b

45°

c

60°

d

70°

answer is B.

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Detailed Solution

Hmax=100m,Rmax.=2×200=400m∴tan⁡θ=4×100400=1 ∵HR=tan⁡θ4 or      θ=45∘
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