A: S = 100/15 + 100/25 = 15/15 = 100 m. Speed = 125/3 m/sec = 145 m/sec. Train length is 150 m. The answer is (D).
Answer the following multiple choice question with options (a), (b), (c), (d), (e) by reasoning step-by-step.
Q:A train speeds past a pole in 15 seconds and a platform 100 m long in 25 seconds. Its length is: Answer Choices: A)145 B)146 C)147 D)150 E)152