Find the cost of fencing around a circular field of diameter 34 m at the rate of Rs.2 a meter?  Choose the correct answer.
A) 215 B) 212 C) 278 D) 279 E) 222

Rationale: "2 * 22 / 7 * 17 = 106 106 * 2 = rs . 212 answer : b"
Answer: B