Question
The area of four walls of a room is 168 cm2.
If the length and breadth of the room were equal and the height of the room is 7 cm, then what is the area of the floor?Solution
According to question, => l = b Area of the wall = 2(l + b)h => 168 = 2(l + l) × 7 => 168 = 4 × l × 7 => l = 168/28 = 6 cm Area of the floor = l × b = 6 × 6 = 36 cm2
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