Question

Calculate the length of tape required to encircle a circular ring of radius 10 cm.

• A. 62.85cm
• B. 65.24 cm
• C. 70.32 cm
• D. None of these

Answer 1

The correct option is A

62.85cm

Length of tape required is equal to the circumference of the circle
Circumference of the circle = $2\pi r$

= $2\times \pi \times 10=20\times \frac{22}{7}=62.85cm$