What is the speed of the train in kmph?
Statements:
I. The train crosses an 'x' metre-long platform in 'n' seconds.
II. The length of the train is 'y' metres.
III. The train crosses a signal pole in 'm' seconds.

Options

A. Any two of the three
B. Only II and III
C. Only I and III
D. Either I and II or II and III

Explanation

To determine the speed of the train in kilometers per hour (km/h), we will analyze the provided statements step by step.

### Step 1: Understanding the First Statement
**Statement I:** The train crosses an 'x' metre-long platform in 'n' seconds.

- When the train crosses a platform, the distance covered by the train is the sum of the length of the train and the length of the platform.
- Therefore, the total distance covered when crossing the platform is \( x + y \) (where \( y \) is the length of the train).
- The speed of the train can be calculated using the formula:
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