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Q.

The maximum horizontal range of projectile is 400 m . The maximum height attained it will be

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a

100 m

b

200 m

c

400 m

d

800 m

answer is A.

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Detailed Solution

Horizontal range is maximum, whenθ=450 Horizontal range, R=u2 sin 2θ/g ∴  400=u2sin2×450g or u2g=400           …(i)Maximum height,H=u2sin24502g=4002×12=100 m .
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