Relevant Competitive Tests:
The perimeter of a floor of a room is 18m.What is the area of four walls of the room if it; a height is 3m?
A. 21 Sq.m
B. 42 Sq.m
C. 54 Sq.mCorrect Answer
D. 108 Sq.m
Correct Option: C. 54 Sq.m
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