NCERT Exemplar Solutions
Class 7 - Mathematics - Unit 9: Perimeter and Area - Multiple Choice QuestionsQuestion 36
Class 7 - Mathematics - Unit 9: Perimeter and Area - Multiple Choice Questions
Question. 36
36. If the radius of a circle is tripled, the area becomes
(a)
(a) 9 times
(b)
(b) 3 times
(c)
(c) 6 times
(d)
(d) 30 times
Detailed Answer with Explanation:
Area ∝ r². If radius becomes 3r, area = 9 times original.