Question
If the length and breadth of a rectangle are in the
ratio 5:3 and its perimeter is 48 cm, then the area of the rectangle (in cm²) is :  ÂSolution
Using the formula, Perimeter = 2(l + b) & Area = length x breadth Let the length and breadth of the rectangle be 5x and 3x cm respectively. Then, 2(5x + 3x) = 48 ⇒ 16x = 48 ⇒ x = 48/16 = 3 Therefore, length = 5x = 15 cm Breadth = 3x = 9 cm Therefore, area = lb = 15 x 9 = 135 cm²
More Mensuration Questions
What will come in the place of question mark (?) in the given expression?
48 X 2.5 + 20% of 150 = ? + 166
36% of 640 – 12.5% of 352 + 25% of 640 = ? – 48% of 432
What will come in the place of question mark (?) in the given expression?
13 X ? = 85 X 4 + √81 + 2
242 + 18 × 8 – ? = 356
32% of 450 + 60% of 150 = ? × 9
(18 x 3) + (36 x 8) = ? + 10
(54/6) × 5 + 12 × (17/2) = ?% of 700
(350/?) = 23 + 33
