Q36 of 40 Page 1

A vertical tower stands on a horizontal plane and is surmounted by a vertical flag-staff of height 6 m. At a point on the plane, the angle of elevation of the bottom and top of the flag-staff are 30° and 45° respectively. Find the height of the tower. (Take √3 = 1.73)

AB → Flag staff

BC → Tower of height (h)


DC → km (say)


In Δ BDC




--------------------------------------(i)


In ΔADC







X = 6 + h ----------------------------------------(ii)


From Eq. (i) and (ii)






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