From the top of a tower 60 m tall the elevation at the top of a hill is found to be equal to the depression at the foot of the hill The height of the hill is
80 m
90 m
100 m
120 m
A
80 m
B
100 m
C
90 m
D
120 m
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Solution
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tanθ=hx=60x or h=60 ∴ Height of hill=60+60=120
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