The diameter of a circle is 42 cm. What is the difference between the lengths of the circumference and the radius of the circle? [Use π = $\frac{22}{7}$]
Answer & explanation
Correct answer: option 3
We know that,
Circumference = 2πr
We are given,
Diameter = 42 cm
Now, according to the question,
= Diameter = 42
= R = 21
So, The circumference = 2πr = 2 × \(\frac{22}{7}\) × 21 = 132 cm
Now, the difference between Circumference and radius is = 132 – 21 = 111 cm