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The area of the four walls of a room is 120 m2 and the length is twice the breadth. If the height of the room is 4 m, then the area of the floor is :
Answer & Solution
Correct Answer:
Option
C
Let the breadth = x metres and length = (2x) metres
Area of 4 walls = [2(2x + x)× 4] m2 = (24x) m2
∴ 24x = 120
⇒ x = 5
So, length = 10 m, and breadth = 5 m
Area of the floor = (10 × 5) m2 = 50 m2
Area of 4 walls = [2(2x + x)× 4] m2 = (24x) m2
∴ 24x = 120
⇒ x = 5
So, length = 10 m, and breadth = 5 m
Area of the floor = (10 × 5) m2 = 50 m2
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