Question

The perimeter of a rectangular

Sheet is 120 cm. If the length is 40 cm, find its breadth.
Also find its area.

Answer 1

Breadth = 20 cm

Area = 800
`cm^(2)`

Explanation:

Perimeter = 120 cm

length = 40 cm

Perimeter = 2 ( L + B )

L - length B - Breadth

120 = 2 ( 40 + B )

120 = 80 + 2B

2B = 120 - 80

2B = 40

B =
`(40)/(2)` = 20 cm

Breadth = 20 cm

Area of a reactangle = Length × Breadth

= 40 × 20

= 800
`cm^(2)`