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Question : What is the circumference of a circle whose radius is 10.5 cm?

Option 1: 21 cm

Option 2: 66 cm

Option 3: 30 cm

Option 4: 110 cm


Team Careers360 21st Jan, 2024
Answer (1)
Team Careers360 25th Jan, 2024

Correct Answer: 66 cm


Solution : The circumference of a circle is given by the formula $C = 2\pi r$ where $r$ is the radius of the circle.
Substituting $r = 10.5$ cm into the formula,
$C = 2\pi \times 10.5= 2\times\frac{22}{7} \times 10.5= 66 \text{ cm}$
Hence, the correct answer is 66 cm.

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