Q.

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

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a

1600 m

b

1300 m

c

1500 m

d

1400 m

answer is C.

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Detailed Solution

in horizontal plane:

dh=(400)2+(300)2=500 m

Final displacement (in vertical plane):

s=(500)2+(1200)2=1300 m

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