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An aeroplane flies 400 m north and 300m south and then flies 1200 m upwards then net displacement isA. 1200 mB. 1300 mC. 1400 mD. 1500 m

Answer» Correct Answer - A
An aeroplane flies 400 m north and 300 m south so the net displacement is 100 m towards north.
Then it flies 1200 m upwards so, `r=sqrt((100)^(2)+(1200)^(2))`
`=1204m ~= 1200 m`
The option should be 1204 m, because this value mislead one into thinking that net displacement is in upwards direction only.


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