What is the speed of the train? I. The train crosses a signal pole in 18 seconds. II. The train crosses a platform of equal length in 36 seconds. III. Length of the train is 330 metres.

• I. The train crosses a signal pole in 18 seconds.
• II. The train crosses a platform of equal length in 36 seconds.
• III. Length of the train is 330 metres.
• A. I and II only
• B. II and III only
• C. I and III only
• D. III and either I or II only
• E. Any two of the three