The length of the shadow of a tower s...

The length of the shadow of a tower standing on level ground is found to be `2x` metres longer when the suns elevation is `30o` than when it was `45o` . The height of the tower in metres is `(sqrt(3)+1)x` (b) `(sqrt(3)-1)x` (c) `2sqrt(3)x` (d) `3sqrt(2)x`

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