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Question : If the circumference of a circle is 13.2 cm, then what is its radius?

Option 1: 1.7 cm

Option 2: 6 cm

Option 3: 21 cm

Option 4: 2.1 cm


Team Careers360 11th Jan, 2024
Answer (1)
Team Careers360 19th Jan, 2024

Correct Answer: 2.1 cm


Solution : Given:
Circumference of the circle = 13.2 cm
Let the radius be $r$.
We know the circumference of the circle = $2\pi r$
⇒ $13.2 = 2\pi r$
⇒ $13.2=2× \frac{22}{7}×r$
⇒ $r = \frac{13.2\times 7}{2\times 22}$
⇒ $r = 2.1$ cm
Hence, the correct answer is 2.1 cm.

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