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 360meters, after what time will they meet at the starting point?
Pick:
A) 20 sec
B) 15 sec
C) 30 sec
D) 24 sec
E) 1 min

Rationale: "they meet every 360 / 7 + 8 = 24 sec answer is d"
Answer: D