Question
The area of four walls of a room is 128 cm2.
If the length and breadth of the room were equal and the height of the room is 8 cm, then what is the area of the floor?Solution
According to question, => l = b Area of the wall = 2(l + b)h => 128 = 2(l + l) × 8 => 128 = 4 × l × 8 => l = 128/32 = 4 cm Area of the floor = l × b = 4 × 4 = 16 cm2
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