Question

sides of a rectangle are in the ratio 7:4.if it's perimeter is 66cm find length and breath




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Answer 1

Answer -

Let us consider the lengthy and breadth be 7x and 4x respectively

To find - Length and breadth of rectangle whose perimeter is 66cm.

We know that ,

Perimeter of rectangle = 2(l+b)

According to question ,

66cm = 2(7x + 4x)

=> 66cm = 14x + 8x

=> 66cm = 22x

=> x = $\frac{66}{22}$

=> $\boxed{x = 3}$

Now,

Length = 7x = 7(3) = 21cm

breadth = 4x = 4(3) = 12cm

Hope it helps you :)

Thanks :)

Answer 2

Answer :

Length = 7x = 7(3) = 21 cm

Breadth = 4x = 4(3) = 12 cm

Explanation :

= Perimeter of rectangle = 2( l+b )

= 66 cm = 2( 7x + 4x )

= 66 cm = 14x + 8x

= 66 cm = 22x

= x = 66/22

= x = 3

Length = 7x = 7(3) = 21 cm

Breadth = 4x = 4(3) = 12 cm