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Question

The perimeter of a floor of a room is 30 m and its height is 3 m. Find the area of four walls of the room.

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Solution

Perimeter of the floor of the room=30 m Height of the oom=3 m Perimeter of a rectangle=2×(length+breadth)=30 m So, area of the four walls=2×(length×height+breadth×height)=2×(length+breadth)×height=30×3=90 m2

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