Question

A rectangle has an area equal to that of a square of side 40 cm. If the breadth of the
rectangle is 20 cm, find its length.​

Answer 1

Step-by-step explanation:

Given that,

Area of rectangle = Area of the square

Here,

The square is having a side of 40cm

And breadth of the rectangle hall is given of 20cm

According to the question,

=> l × b = (side)²

=> l × 20 = (40)²

=> l = 1600/20

=> l = 80cm.

Answer 2

Answer :-

• Length of Rectangle = 80 cm.

Explanation :-

Given :

• A rectangle has an equal area to that of an square.

• Side of Square = 40 cm.

• Breadth of Rectangle = 20 cm.

To Find :

• Length of Rectangle.

Solution :

It is Given that,

Area of Rectangle = Area of Square.

And We know that,

• Area of Rectangle = l × b.

• Area of Square = (side)²

Put them equal.

➞ l × b = side²

Put the Values.

➞ 20 × l = 40²

➞ 20 × l = 1600.

➞ l = 1600/20.

➞ l = 80 cm.

Therefore, Length of Rectangle = 80 cm.