1.

A hall is 15 m long and 12 m wide. If the sum of areas of the floor and ceiling is equal to the sum of the area of its four walls, then the volume of the hall in cubic meter is ______________

A. 2200 to 2300
B. 500 to 600
C. 1200 to 1200
D. 600 to 1000
Answer» D. 600 to 1000


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