A train with a length of 100 meters, is traveling at a speed of 72 km/hr. The train enters a tunnel 2.3 km long. How many minutes does it take the train to pass through the tunnel from the moment the front enters to the moment the rear emerges?  Choose the correct choice from the following answers
A) 2.0
B) 2.5
C) 3.0
D) 3.5
E) 4.0

Rationale: 72 km / hr = 1.2 km / min the total distance is 2.4 km . 2.4 / 1.2 = 2 minutes the answer is a .
Answer: A