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  4. A man goes 20 m towards north, then 30 m towards east then his displacement is:

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Q. A man goes $20$ m towards north, then $30$ m towards east then his displacement is:

Motion in a Straight Line

Solution:

Resultant or magnitude of there position
$=\sqrt{(20)^{2}+(30)^{2}}$
$r =\sqrt{400+900}$
$=\sqrt{1300}=36.05 m$