Two circles have radii 16cm and 23cm. What is the difference between their circumference? take (pi = frac{22}{7})
-
A.
422.92cm -
B.
149.92cm -
C.
44.00cm -
D.
43.96cm
Correct Answer: Option C
Explanation
r = 16, R = 23; 2(pi R – 2 pi r)
= 2(pi(R – r))
= 2 x (frac{22}{7} (23 – 16))
= 2 x (frac{22}{7} times (7))
= 44cm