The shadow of a tower standing on a level plane is found to be 50 m longer when sun's elevation is 600 than when it is 30∘. The height of the tower is 25√p, then p is
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Solution
Let h=height of the tower, l=length of the shadow From data, tan60∘=√3=lh and tan30∘=1√3=l−50h Solving two equations, √3(√3h−50)=h 50√3=2h h=25√3