Question

the ratio of length of breath of a rectangle is 4:5 and its perimeter is 72 cm.find the length and of the rectanguler​

Answer 1

Answer:

20 cm.

Step-by-step explanation:

Sides of the rectangle are in the ratio of 4:5

Let the length l=5x

and the breadth b=4x

Now, perimeter =2(l+b)=90cm

2(5x+4x)=90

2(9x)=90

18x=90

x=5

Therefore, Length l=5x=25cm

and the breadth b=4x=20cm

solution

Answer 2

Answer:

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Step-by-step explanation:

Sides of the rectangle are in the ratio of 4:5

Let the length l=4x

and the breadth b=5x

Now, perimeter =2(l+b)=72

2(4x+5x)=72

2(9x)=72

18x=72

x=72/18

x=4

Therefore, Length l=4x=16cm

and the breadth b=5x=20cm