The area of four walls of a room is 140 cm2. If the length and breadth of the room were equal and the height of the room is 7 cm, then what is the area of the floor?
According to question, => l = b Area of the wall = 2(l + b)h => 140 = 2(l + l) × 7 => 140 = 4 × l × 7 => l = 140/28 = 5 cm Area of the floor = l × b = 5 × 5 = 25 cm2
23 45 89 155 ? 353
15, 120, 840, 5040, ?, 100800
11 20 ? 64 112 192
...115, 138, 163, 190, 219, ?
14.8% of 7200 – 16.4% of 6200 + 15.09% of 8100 = 10% of ?
64, 66, 69, 74, 81, ?
7, 7, 21, 105, ?, 6615
4 11 22 ? 56 79 106
...12, 27, ?, 113, 141, 285, 313
Choose the missing term.
3F, 6G, 11I, 18L,?
