# An aeroplane flies 400 m due north and then 300 m due south and then flies 1200 m upwards, the net displacement is ?

##### 1 Answer

#### Answer:

The net displacement is **1204 m**.

#### Explanation:

The *net displacement* of the plane will be the **shortest distance** between its starting point and its finish point.

Let's assume that your plane starts in point **400 m** *north* to point **300 m** *south* to point

Since north and south are opposite directions, the plane will end up very close to where it started, i.e. point

So, horizontally, the plane only travelled **100 m** from its starting point. At this point, its flight path turns upwards.

The plane flies **1200 m** upwards to point *hypothenuse* of a right triangle with sides *100* and *1200*.

This means that the *net displacement*, which is equal to