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Q.

A Body is projected at an angle of 45° with horizontal. It just clears a wall which is at a distance of 2m from the point of projection and strikes the ground at a distance of 4m behind the wall. Height of wall is

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a

23m

b

43m

c

13m

d

2 m

answer is B.

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Detailed Solution

y=xTan⁡ θ1−xR=2(1)1−26=21−13=43m

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A Body is projected at an angle of 45° with horizontal. It just clears a wall which is at a distance of 2m from the point of projection and strikes the ground at a distance of 4m behind the wall. Height of wall is