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If a tower 30 m high, casts a shadow 10...

If a tower 30 m high, casts a shadow `10sqrt3m` long on the ground, then what is the angle of elevation of the sun ?

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It is given that AB = 30 m be the tower and `BC=10sqrt3` m be its shadow on the ground.
Let `theta` be the angle of elevation.
In right triangle,
`tantheta=(AR)/(BC)`
`=30/(10sqrt3)=3/sqrt3=sqrt3`
`=tan 60^(@)`
`:." " theta=60^(@)`
Hence, angle of elevation `=60^(@)`
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