Question

The sides of a rectangle are in the ratio of 8:7 and it’s perimeter is 90 cm. The length of the rectangle is ???Show the explanation

Answer 1

Answer:

Length of the rectangle is 21 cm..

Step-by-step explanation:

Let the length and breadth of the rectangle be 8x and 7x.

perimeter of the rectangle => 2(L + B) = 90 cm

=> 2(8x + 7x) = 90 cm

=> 2 X 15x = 90 cm

=> 30x  = 90 cm

=> x = 3 cm

Therefore, Length = 8x = 8 X 3 = 24 cm

Breadth = 7x = 7 X 3 = 7 X 3 = 21 cm

Answer 2

Answer:

Lets take 8:7 as 8x and 7x respectively,

Step by step explanation:-

perimeter of the rectangle = 90cm

2×(l+b) = 90cm

2×(8x+7x) = 90

2× 15x = 90

15x = 90/2

15x = 45

x = 45/15

x = 3cm

Therefore, 8x = 8×3

= 24cm

7x = 7×3

= 21cm

So, length= 24cm

breadth= 21cm