Nicky and Cristina are running a race. Since Cristina is faster than Nicky, she gives him a 30 meter head start. If Cristina runs at a pace of 5 meters per second and Nicky runs at a pace of only 3 meters per second, how many seconds will Nicky have run before Cristina catches up to him? Choose the correct choice from the following answers:
A) 15 seconds	B) 18 seconds	C) 25 seconds	D) 30 seconds	E) 45 seconds

Rationale: "used pluging in method say t is the time for cristina to catch up with nicky , the equation will be as under : for nicky = n = 3 * t + 30 for cristina = c = 5 * t @ t = 15 , n = 75 c = 75 right answer ans : a"
Answer: A