Question

10.
rectangle.
(a) The perimeter of a rectangle is 38 cm and its length is 12 cm. Find its breadth.
(b) The perimeter of a rectangle is 40 cm and its breadth is 8 cm. Find its length.
m 65 cm​

Answer 1

Answer:

(a) 7 cm, (b) 12 cm.

Step-by-step explanation:

(a) Perimeter of rectangle = 2(l+b)

Given, perimeter = 38 cm and length = 12 cm.

=> 2(12+b) = 38

=> 12+b = 38/2

=> 12+b = 19

=> b = 19-12

=> breadth = 7 cm

(b) Perimeter of rectangle = 2(l+b)

Given, perimeter = 40 cm and breadth = 8 cm.

=> 2(l+8) = 40

=> l+8 = 40/2

=> l+8 = 20

=> l = 20-8

=> length = 12 cm