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Let length and breadth of the rectangle is 7x metres and 5x metres respectively. Area of rectangle = 7x × 5x = 35x2 m2 When length is increased, area of the rectangle = 1.15 × 7x × 5x = 40.25x2 m2 According to question; 40.25x2 – 35x2 = 84 Or, 5.25x2 = 84 Or, x2 = 16 x = 4 Perimeter of the rectangle = 2 × (7 + 5) × 4 = 96 metres
46.2 × 8.4 × 3 + ? = 1200
63- [22-{24 ÷ 3-(9-15 ÷ 5) ÷ 6}]=?
14 × 6 + 9 × 11 = (82 – 3) × ?
(12% of 1250 + 85% of 400) x 10 = ?2
∛21952 × 44 = ? × 14
`sqrt(5476)` + 40% of 1640 = ?`xx` 4 - 2020
654.056 + 28.9015 × 44.851 – 43.129 = ?
212 + 14 × 23 – 28 × 15 = ?
?3 - 25 × 11 = 30 - 15 × 12