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1 . If the radius of a circle is tripled, the circumference is

A. multiplied by 3
B. multiplied by 6
C. multiplied by 9
D. multiplied by 12

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Answer: Option A

Explanation:

When the radius of a circle is tripled, the circumference is multiplied by 3.

The formula for the circumference of a circle is C = 2πr, where "C" is the circumference and "r" is the radius. If you triple the radius, the new radius becomes 3r.

So, the new circumference will be:

New Circumference = 2π(3r) = 6πr

This is three times the original circumference (2πr), which means it's multiplied by 3.

সহকারী পরিচালক(AD) -12.11.2021

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