Question

The length and breadth of a rectangle are in the ratio 7: 5 .find the length and breadth ,if it's perimeter is 84 cm

Answer 1

Answer:

Step-by-step explanation:

Let the length and breadth of the rectangle be 7x and 5x respectively.

Then, 2(7x+ 5x)= 84cm

→(12x)= 42

→x= 7/2

Thus, length of the rectangle= 49/2cm= 24.5cm

And. breadth of the rectangle= 35/2cm= 17.5cm

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Answer 2

Answer:

let length be 7x,

breath be 5x

perimeter of rectangle = 2(l + b)

84 = 2(7x + 5x)

84 = 2(12x)

84 = 24x

x = 84 ÷ 24

thus,

x = 3.5

If x = 3.5 than,

lenght = 7x

= 7(3.5)

=24.5

breath = 5x

= 5(3.5)

= 17.5

Hope this helps you