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ABCD is a reactangular field .A verti...

ABCD is a reactangular field .A vertical lamp post of height 12 m stands at the corner A. If the anngle of elevation of its top from B is ` 60^@` and from C is `45^@` , then the area of the field is

A

`48 sqrt(2) sq .m`

B

`48 sqrt(3) sq.m`

C

`48 sq .m`

D

` 12 sqrt(2) sq .m`

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