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