The perimeter of the floor of a room is 18 metres.
The perimeter of the floor of a room is 18 metres. What is the area of the walls of the room. If the height of the room is 3 metres?
A$$21 m^2$$
B$$42 m^2$$
C$$54 m^2$$
D$$108 m^2$$
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Answer is : c.) \(54\text{ m}^2\)
Explanation:
If the floor is in rectangular shape
Then your answer is,
Perimeter of rectangle =2(l+b)
18=2(l+b)
Then,
\(\text{Area of four walls =}2(l+b)\times h\)
\(\text{Area of four walls=}18\times3 \)
\(\text{Area of four walls = }54\text{ m²}\)
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