The perimeter of a rectangle is 130 cm. If the breadth of the rectangle is 30 cm, find its length. Also, find the area of the rectangle.

Perimeter of rectangle = 130 cm
⇒ 2 (length + breadth) = 130 cm
⇒ 2 (length + 30) = 130
⇒ length + 30 = 130/2
⇒ length + 30 = 65
⇒ length = 65 – 30 = 35 cm
⇒ Now area of rectangle = length x breadth = 35 x 30 = 1050 cm²
Thus, the area of rectangle is 1050 cm².

Class 7 Maths Chapter 11 Exercise 11.1

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