Questions
A flagstaff stands at the center of a rectangular field whose diagonal is 1200m, and subtends angles and at the mid points of the sides of the field. The height of the flagstaff is
detailed solution
Correct option is C
Let OP be the flagstaff of height ‘h’ standing at the center O of the rectangular field ABCD subtending angles 150and 450 at E the F, the mid points of the sides AD and DC of the field .Then OE=hcot150=h2+3 and OF=hcot450=h⇒EF=h12+2+32=2h2+3⇒1200=AC=2EF=4h2+3⇒h=3002+3=3002−3Talk to our academic expert!
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The angle of elevation of top of an unfinished tower at a point distance 120m from its base is 450. How much height must the tower be raise so that angle of elevation of top at the same point to be 600.
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