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From a point on the ground at a distance...

From a point on the ground at a distance `a` from the foot of a pole, a ball is thrown at an angle of `45^@`, which just touches the top of the pole and strikes the ground at a distance of `b`, on the outer side of it. Find the height of the pole.

A

`2//3 m`

B

`3//4 m`

C

`1//2 m`

D

`4//3 m`

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The correct Answer is:
D
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