**CBSE NCERT Solutions Chapter 6 Triangles Exercise 6.5 Question 11**

**11 .** An aeroplane leaves an airport and flies due north at a speed of 1000 km per hour. At the same time, 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 hours?

**Solution:**

Distance traveled by aeroplane in hrs towards North direction = = 1500 km

Distance traveled by other aeroplane in hrs towards West direction = = 1800 km

We want to find distance (AC) between two aeroplanes after hrs

**Using Pythagoras theorem, we get**

Km