20. A man observes two vertical poles which are fixed opposite to each other on
either ude of the road irche width of the road is 90 feet and height of the
pole are in the rato 1:2, also the angle of elevabion of their tops from a
paint between the line joining the foot of the poles on the road is 60°. Find
the heights of the poles.
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Answer:
45√3 and 90√3
in ∆abc ∆b=60°
AC÷BC=tan60°
2h÷90=√3
2h=90√3
h=90√3÷2
h=45√3
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