The perimeter of the floor of a room is 18 metres.

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RRB TC CC Exam (Chandigarh) 2008 click here to view all questions

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,  $\text{Area of four walls =}2(l+b)\times h$ $\text{Area of four walls=}18\times3$ $\text{Area of four walls = }54\text{ m²}$ Nithin K ? answered Apr 7 '2018 at 16:11 All Comments

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