The breadth of a rectangle is four times of its length. If the area of the rectangle is 1764, then what is the breadth of the rectangle ?

84

We know that,

Area of rectangle = length × breadth

The area of the rectangle = 1764 cm²

Let the breadth of the rectangle be a then its length is 4a

Area = length × breadth

= 4a × a = 1764

= a² = 441

= a = 21

Length of the rectangle = 4 × 21 = 84 cm