Question

The ratio of length to the breadth of a rectangular playground is 7:4. If the
length of the playground is 63 m, then its breadth is
​

Answer 1

Step-by-step explanation:

Let length =5x and breadth=2x

Area of rectangle=5x×2x=10x

2

Perimeter of rectangle=2(l+b)=2×(5x+2x)=14x

Now,

A

P

=

3

1

⇒

10x

2

14x

=

3

1

⇒x=4.2

∴Length of rectangle=5×4.2=21 units.

Answer 2

Answer: 36 m

Step-by-step explanation:

Given: Ratio of length to the breadth of

a rectangular playground= 7:4

Length of the playground= 63 m.

To find: Breadth of the playground.

Solution:

Let the length and breadth of the playground be 7x and 4x respectively.

But, 7x = 63 ( as in question)

x = $\frac{63}{7}$

x = 9

Therefore, breadth of the playground

= 4×9

= 36m