The angles of elevation of top and bottom of a flag kept on a flag post from 30 metres distance, are 45 and 30 deg respectively. Height of the flag is [taking √3 = 1.732]
A) 12 √3 m B) 15 m C) 14.32 m D) 12.68 m
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tan30∘=BC30& tan45∘=ACCDtan30∘=BC30& tan45∘=ACCD
BC=103–√ CD=AC=30BC=103 CD=AC=30
Height of flag AB = AC - BC
=30−103–√=30−17.32=30−103=30−17.32
=12.68m
Hope it's helps you ☺️
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