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The height of a tower is 100 m. When ...

The height of a tower is 100 m. When the angle of elevation of the sun changes from `30o` to `45o` , the shadow of the tower becomes `x` metres less. The value of `x` is (a) 100 m (b) `100sqrt(3)m` (c) `100(sqrt(3)-1)m` (d) `(100)/(sqrt(3))m`

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