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A person goes `10 km` north and `20 km` east. What will be displacement from initial point ?

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A person goes `10 km` north and `20 km` east. What will be displacement from initial point ?
A. `22.36 Km`
B. `2 km`
C. `5 km`
D. `20 km`
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1 Answer

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Correct Answer - A
`vec(AC)=vec(AB)+vec(BC)`
`AC=sqrt((AB)^(2)+(BC)^(2))`
`=sqrt((10)^(2)+(20)^(2))`
`=sqrt(100+400)= sqrt(500)`
`=22.36 km`
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