The angle of elevation of a building from a measuring instrument placed on the ground is 30o. If the building is 40m high, how far is the instrument from th...

Question 1 Report

The angle of elevation of a building from a measuring instrument placed on the ground is 30o. If the building is 40m high, how far is the instrument from the foot of the building?

\frac{20}{\sqrt 3}

m

\frac{40}{\sqrt 3}

m

20√3m

40√3m

Answer Details

$\frac{40}{x}$ = tan 30o
x = $\frac{40}{t a n 36}$
= $\frac{40}{1 \sqrt{3}}$
= 40√3m

Read lesson note on Angles And Intercepts On Parallel Lines (WAEC)

Angles And Intercepts On Parallel Lines

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