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A tower stands on the top of a building which is 40 metres high. The angle of depressiotf of a point situated on the ground-from the top and bottom of the tower are found to Be `60^@` and `45^@` respectively.What is the height (in metres) of tower?
एक भवन जिसकी ऊँचाई 40 मीटर है, के शिखर पर एक मीनार खड़ी है। मीनार के शिखर तथा पांद बिन्दु से भूमि पर स्थित एक बिन्दु का अर्वनमन कोण क्रमशः `60^@` तथा `45^@` है। मीनार की ऊँचाई (मीटर में) क्या है ?

A

`20 sqrt3`

B

`30(sqrt3+1)`

C

`40(sqrt3-1)`

D

`50(sqrt3-1)`

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CHAMPION PUBLICATION-2017 TIER-II PAPER(8)-EXERCISE
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