Find the cost of fencing around a circular field of diameter 36 m at the rate of Rs.3.50 a meter?
Choose the most appropriate option
A) 438
B) 395
C) 378
D) 279
E) 222

Rationale: "2 * 22 / 7 * 18 = 113 113 * 3 1 / 2 = rs . 395 answer : b"
Answer: B