Question

Explain and correct the error in the example above

Answer 1

C = 28.26 cm

Explanation:

The figure shows a circle of diameter 9 inches.

The person has taken radius r as 9 inches which is wrong.

The radius must be (9/2) = 4.5 inches, such that,

Circumference = 2πr

= 2×3.14×4.5

= 28.26 cm

Hence, this is the required solution.