Question

An aeroplane flies $400m$ towards the north, $300m$ towards west and then $1200m$ vertically upwards. Then, its displacement from the initial position is

• A. $1400m$
• B. $1500m$
• C. $1300m$
• D. $1200m$

Answer 1

The correct option is C $1300m$

OP is the displacement

displacement in horizontal plane is
$h=\sqrt{{\left(400\right)}^2+{\left(300\right)}^2}=500m$
Now net displacement is
$s=\sqrt{{\left(500\right)}^2+{\left(1200\right)}^2}=1300m$