A: Speed = 72 * 5/18 = 30/3 m/sec Total distance traveled = 3.5 * 100 = 3500 m Required time = 3 minutes The answer is (A).
Answer the following multiple choice question with options (a), (b), (c), (d), (e) by reasoning step-by-step.
Q:A train with a length of 100 meters, is traveling at a speed of 72 km/hr. The train enters a tunnel 3.5 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? Answer Choices: A)3 B)4.2 C)3.4 D)5.5 E)5.7