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The area of the four walls of a room is ...

The area of the four walls of a room is 2640 sq. m and the length is twice the breadth and the height is given as 11 m. What is the area of the ceiling?

A

`2800 m^2`

B

`3200 m^2`

C

`320 m^2`

D

none of these

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The correct Answer is:
B
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