Question

Find the perimeters of the rectangles whose lengths and breadths are given below:

(i) 7 cm, 5 cm
(ii) 5 cm, 4 cm
(iii) 7.5 cm, 4.5 cm

Answer 1

(i) Perimeter of a rectangle = 2$\times$(Length + Breadth)
$\because$ Length = 7 cm, Breadth = 5 cm
$\therefore$ Perimeter = 2 $\times$(7 + 5) = 2 $\times$ (12) = 24 cm

(ii) Perimeter of a rectangle = 2 $\times$ (Length + Breadth)
$\because$ Length = 5 cm, Breadth = 4 cm
$\therefore$ ​Perimeter = 2 $\times$ (5 + 4) = 2 $\times$ (9) = 18 cm

(iii) Perimeter of a rectangle = 2 $\times$ (Length + Breadth)
$\because$ Length = 7.5 cm, Breadth = 4.5 cm
$\therefore$ P​erimeter = 2 $\times$ (7.5 + 4.5) = 2 $\times$ (12) = 24 cm