Question
The perimeter of a rectangle is 120 cm. If the side of
the square is equal to the average of the rectangle’s length and breadth, what is the area of the square?Solution
ATQ, Perimeter of the rectangle = 2 × (l + b) The sum of the length and breadth = 120 / 2 = 60 cm The side of the square = 60 / 2 = 30 cm Area of the square = a² The area of the square = 30 × 30 = 900 cm²
205     255     292     ?     335     345
...14Â Â Â Â Â 15Â Â Â Â Â Â Â 32Â Â Â Â Â Â 99Â Â Â Â Â Â 400Â Â Â Â Â Â ?
...32, ?, 41, 68, 132, 257
...If  2  4  6  x  14  28  30
Then, x³+ 2 x+1 = ?
5Â Â Â Â Â Â Â Â Â Â Â Â Â Â 9Â Â Â Â Â Â Â Â Â Â Â Â Â Â 30Â Â Â Â Â Â Â Â Â Â Â 115Â Â Â Â Â Â Â Â Â 582Â Â Â Â Â Â Â Â Â 3483
15Â Â Â Â ...
If   314     306      x      269       394    178    1480
Then, 1/3 x + 2x - x = ?
...29    51    95    183    ?     711
5     16     ?      66     119      200
...28         57           172           689          ?              20677
...21     84      168      172     ?     348
...
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