An aeroplane moves `400m` towards north, `300m` towards west and then `1200m` vertically upward. Then its displacement from the initial position is

Options

A. 1300 m
B. 1400 m
C. 1500 m
D. 1600 m

Answer

A

Explanation

` x=400 m , y= 300 m ,z=1200 m`
` r= sqrt( x^2 +y^2 +z^2)`
` = sqrt((400 )^2 +(300)^2 + (1200)^2) `
` = 100 sqrt(16 +9 + 144) = 1300 m`