Question

The perimeter of a rectangle is 120 m its breadth is 45 m what is its breadth

Answer 1

Answer:

perimeter=2×(l+b)

120m=2×(45+b)

60m=45+b

b=15m

Answer 2

Given :-

The perimeter of a rectangle = 120 m

Length of the rectangle = 45 m

To Find :-

The length of the rectangle.

Analysis :-

Consider the breadth as a variable.

Substitute the values in the formula of area of rectangle.

Then find the value of the variable accordingly.

Solution :-

We know that,

• l = Length
• b = Breadth
• p = Perimeter

Let the breadth be 'x'.

By the formula,

$\underline{\boxed{\sf Perimeter \ of \ rectangle=2(Length + Breadth) }}$

Given that,

Perimeter (p) = 120 m

Length (b) = 45 m

Substituting their values,

120 = 2(x + 45)

120 = 2x + 90

By transposing,

2x = 120 - 90

2x = 30

Finding x,

x = 30/2

x = 15

Therefore, the breadth of the rectangle is 15 m.