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The angles of elevation of the top of a tower, from the top and the foot of a pole of height 10 m, are 30° and 60° respectively. The height of the tower is
Let the height of tower be h metres.
tan 30 = 1/root3 = (h-10)/base
base = (h-10) *root3
tan 60 = h/base
base = h/root3
So, (h-10) *root3 = h/root3
3h - 30 = h
h = 15 metres, therefore, height of tower is 15 metres.
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