Question
Area of 4 walls of a room is 108 m2 .If height and length of room is in ratio 2: 5 and height and breadth in ratio 4: 5. Find the area of floor of the room?
Answer: Option C
- Given: L : H = 5 : 2 Þ H : B = 4 : 5
L : H : B = 20 : 8 : 10
Area of four walls of a room is =2(l + b) h = 108 Þ (l + b) h = 54
(20 x + 10x) x 8x = 54
240x2 = 54
x2 = 54 / 240
x2 = 0.225
The area of floor of the room = l x b =l × b = 20x × 10x =200x2 =200x 225= 45m2
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- Given: L : H = 5 : 2 Þ H : B = 4 : 5
L : H : B = 20 : 8 : 10
Area of four walls of a room is =2(l + b) h = 108 Þ (l + b) h = 54
(20 x + 10x) x 8x = 54
240x2 = 54
x2 = 54 / 240
x2 = 0.225
The area of floor of the room = l x b =l × b = 20x × 10x =200x2 =200x 225= 45m2
Was this answer helpful ?
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