The angle of elevation of a building from a measuring ins...
The angle of elevation of a building from a measuring instrument placed on the ground is 30°. If the building is 40m high, how far is the instrument from the foot of the building?
20√3m
40√3m
20√3m
40√3m
Correct answer is D
40x = tan 30°
x = 40tan30
= 401√3
= 40√3m
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