Question
The length of a rectangle is 7 metres more than its
width. If the perimeter of the rectangle is 74 metres then what is the area (in m2Â ) of the rectangle?Solution
Let the width of the rectangle = ‘x’ metres Then, length of the rectangle = (x + 7) metres Perimeter of the rectangle = 2 × (length + width) Or, 2 × (x + x + 7) = 74 Or, 2x + 2x + 14 = 74 Or, 4x = 74 – 14 = 60 Or, x = 60/4 = 15 m So, area of the rectangle = x × (x + 7) = 15 × 22 = 330 m2
3% of 842 ÷ 2% of 421 = ?
2856 ÷ 34 = ?% of 240
- Simplify:
(21 × 51 + 81)/(9 × 14 - 30) = ?
?2 = (1035 ÷ 23) × (1080 ÷ 24)Â
110 ÷ 5.5 + (?)3 ÷ 12 = 20(2/3)
360 ÷ 9 + 15 % of 200 + ? * 10 = 45 * √25
(26)2 = {(20% of 40% of 18200) ÷ ?} × 1664 ÷ 128Â
104 × 21 ÷ 13 + ? % of 300 = 320 + 22
125 + 30% of 250 + √576 = ?