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The area of 4 walls of a room is 120 m2. The length of the room is twice its breadth. If the height of the room is 4 m, what is the area of the floor?1). 40 m22). 50 m23). 60 m24). 80 m2 |
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Answer» Let the breadth and length of the room be ‘X’ and ‘2X’; Height of the room is given 4 m; Area of 4 walls = 2(l + b) × h ⇒ 120 = 2(3x) × 4 ⇒ 3x = 15 ⇒ x = 5 m Breadth = 5 m and Length = 10 m ∴ Area of the floor = 50 m2 |
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