A man goes $10\,m $ towards North, then $ 20\,m$ towards east then displacement is........$m$
$22.5$
$25$
$25.5$
$30$
A man goes $10\,m $ towards North, then $ 20\,m$ towards east then displacement is........$m$
$\vec r = 20\hat i + 10\hat j$
$\therefore r = \sqrt {{{20}^2} + {{10}^2}} = 22.5\,m$
$\therefore r = \sqrt {{{20}^2} + {{10}^2}} = 22.5\,m$
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