Find the cost of fencing around a circular field of diameter 40 m at the rate of Rs.3 a meter?  Choose the correct choice from the following choices:
A) 400	B) 370.4	C) 376.98	D) 340.9	E) 350.03

Rationale: "2 * 22 / 7 * 20 = 125.66 125.66 * 3 = rs . 376.98 answer : c"
Answer: C