An aeroplane leaves an airport and flies due north at a speed of 1000 km per hour. At the same tune, another aeroplane leaves the same airport and flies due west at a speed of 1200 km per hour. |How far apart will be the two planes after 1`1/2

Explanation

To solve the problem step by step, we will calculate the distances traveled by both aeroplanes and then use the Pythagorean theorem to find the distance between them.

### Step 1: Calculate the distance traveled by the first aeroplane (northbound)
The first aeroplane flies due north at a speed of 1000 km/h. We need to find the distance it travels in 1.5 hours.

**Distance = Speed × Time**

- Speed of the first aeroplane = 1000 km/h
...