Broad Gauge of 1676 mm is the predominant gauge in Indian Railways, used for major routes.

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The engine or motor in diesel/electric locomotives converts fuel or electrical energy into mechanical energy for movement.

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Average speed = Distance/Time = 480/8 = 60 km/h

To find average speed, use the formula: Average Speed = \(\frac{\text{Total Distance}}{\text{Total Time}}\)

Step 1: Identify the given information

- Departure time: 6:00 AM

- Arrival time: 2:00 PM

- Distance: 360 km

Step 2: Calculate total travel time

Step 3: Apply the average speed formula

Step 4: Simplify

Answer: The average speed is \(45\,\text{km/h}\) (Option A)

The broad gauge of 1676 mm (or 5 feet 6 inches) is the standard gauge used in most of Indian Railways.

Average speed = Total distance / Total time = 360 km / 12 hours = 30 km/h

Percentage increase = [(90-60)/60] × 100 = (30/60) × 100 = 50%

Yellow light (or amber signal) indicates caution or proceed with reduced speed in railway signaling systems.