Question

The area of a rectangle is 18 cm. It's length is double than that breadth, (1) Find its length and breadth (2) Find its perimeter? ​

Answer 1

Let dimensions be x and 2x

Now

• Area=18
• LB=18
• 2x(x)=18
• 2x²=18
• x²=9
• x=3

Now

Breadth=3

Length=2(3)=6

Perimeter

• 2(3+6)=2(9)=18cm

Answer 2

• 3 cm, 6 cm
• 18 cm

Explanation:

Let the width is x, then the length is 2x.

Area of rectangle:

• x*2x = 18
• 2x² = 18
• x² = 9
• x = 3

Dimensions are:

• 3 cm and 6 cm

Perimeter is:

• P = 2(3 + 6) = 18 cm