Find the cost of fencing around a circular field of diameter 30 m at the rate of Rs.2 a meter?  Select
A) 100.5  B) 188.5  C) 190.5  D) 168.5  E) 175.5

Rationale: "2 * 22 / 7 * 15 = 94.25 94.25 * 2 = rs . 188.5 answer : b"
Answer: B