Question

If the radius of a circular design made of wire is 10 ft, find the total length of the wire used to make the design? (Round off to 2 decimal places)
$\text{[Take 𝛑=}\frac{22}{7}]$

• A. 15.71 ft
• B. 62.86 ft
• C. 94.29 ft
• D. 31.42 ft

Answer 1

The correct option is B 62.86 ft

Given:
Radius(r) = 10 ft

Total length of wire = Circumference of the design
= 2𝛑r
$=2\times \frac{22}{7}\times 10$
= 62.857 ft
= 62.86 ft