Two cyclist start on a circular track from a given point but in opposite direction with speeds of 7m/s and 8m/s. If the circumference of the circle is 675meters, after what time will they meet at the starting point?  Choose the correct choice from the following answers:	A) 20 sec	B) 15 sec	C) 45 sec	D) 50 sec	E) 1 min

Rationale: "they meet every 675 / 7 + 8 = 45 sec answer is c"
Answer: C