A broad gauge train runs at a speed of 72 km/h on a curved track of radius of curvature 1 km. Find the elevation of the outer rail above the inner rail so that there may be side-pressure on the rails ? Distance between the rails is 1.7 m.

Explanation

To solve the problem of finding the elevation of the outer rail above the inner rail for a train running on a curved track, we can follow these steps:

### Step-by-Step Solution:

1. **Convert Speed from km/h to m/s**:
The speed of the train is given as 72 km/h. To convert this to meters per second (m/s), we use the conversion factor:
\[
\text{Speed in m/s} = \text{Speed in km/h} \times \frac{5}{18}
...