1.

The shadow of tower standing on a level plane is found to be 60 metres longer when the altitude of be san is 30∘ than when it is 45∘.Then the height of the tower (in metres) is:

Answer»

`20 ( SQRT 3 +1)`
`30 (SQRT3+1)`
`10 (sqrt3 +1)`
NONE of these

Answer :B


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