Find the breadth of the rectangle whose perimeter is 360 cm and whose length is 100 cm.

Hint: we calculate the breadth of the rectangle by using the value of length and by using the formula of perimeter of the rectangle
Formula used: Perimeter of rectangle is $2 \times \left( {l + b} \right)$.


Complete step by step solution:
Given perimeter of rectangle = $360$ cm and length is $100$cm, b = ?
We know that perimeter of rectangle $2 \times \left( {l + b} \right)$
$360 = 2\left( {100 + b} \right)$
$\dfrac{{360}}{2} = 100 + b$
$180 = 100 + b$
$b = 180 - 100 = 80cm$
Hence the breadth of the rectangle is $80$cm.
Additional information: A rectangle is a quadrilateral with four right angles. Its opposite sides are equal.
Area of rectangle $ = length \times breadth$.

Note: Here,perimeter of the triangle is given,incase if the area of the rectangle was given,then make use of the formula of area and solve it