A school boy lying on the ground 30m away from the foot of a water tank towel observes that the angle of elevation of the top of the tank is 60o. Calculate the height of the tank.

A school boy lying on the ground 30m away from the foot of a water tank towel observes that the angle of elevation of the top of the tank is 60o. Calculate the height of the tank.
A. 60√3m
B. 30√3m
C. 20√3m
D. 10√3m
Correct Option: Answer is B
Solution:

60 = opp/adj = h/30
Therefore h = 30 tan 60
Tan 60 = √3
= 30√3

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