Question

the length and breadth of a rectangle are in ratio 7:4 . find the perimeter of the rectangle if its length is 121cm

Answer 1

Answer:

38.5cm, 22cm

Step-by-step explanation:

Given

Ratio of sides is 7:4

Perimeter is 121cm

Let sides be 7x the, 4x (eq. 1)

Perimeter = 2 (l + b)

121 = 2 (7x + 4x)

121 = 2 (11x)

121 = 22x

x = 121 ÷ 22

x = 5.5

Now substitute x = 5.5 in eq. 1

7x = 7 × 5.5 = 38.5cm

4x = 4 × 5.5 = 22cm

Therefore, the two sides of rectangle are 38.5cm and 22cm respectively.