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
More Mensuration Questions
Find the wrong number in the given number series.
24, 120, 720, 5040, 40320, 362881
128, 350, 609, 898, 1222, 1583
- Find the wrong number in the given number series.
3, 15, 18, 54, 56, 51 11, 12, 20, 58, 234, 1168
48, 72, 104, 144, 192, 251
2, 6, 24, 96, 384, 1536, 6144
Find the wrong number in the given number series.
119, 200, 300, 417, 565
2400,3600,5400,7200,12150
8 10.4 6.8 10.2 7.6 10
7, 22, 68, 207, 620, 1880
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