NCERT Exemplar Solutions
Class 7 - Mathematics - Unit 9: Perimeter and Area - Multiple Choice Questions
Question 29

Question.  29

29. If the sides of a parallelogram are increased to twice its original lengths, how much will the perimeter of the new parallelogram be?

(a)

(a) 1.5 times

(b)

(b) 2 times

(c)

(c) 3 times

(d)

(d) 4 times

Detailed Answer with Explanation:

Perimeter of parallelogram = 2(l + b).

If each side is doubled: new perimeter = 2(2l + 2b) = 2 × 2(l+b).

So perimeter doubles.

NCERT Exemplar Solutions Class 7 – Mathematics – Unit 9: Perimeter and Area – Multiple Choice Questions | Detailed Answers