Find the magnitude of resultant of P and Q shows in figure.Given $| P | = 20 u n i t s a n d | Q | = 10 u n i t s$

10 \sqrt{5} u n i t s

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10 \sqrt{3}

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5 \sqrt{10} u n i t s

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zero

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Solution

The correct option is A $10 \sqrt{5} u n i t s$
$\begin{matrix} R = \sqrt{P^{2} + Q^{2}} = \sqrt{400 + 100} = \sqrt{500} = 10 \sqrt{5} u n i t H e n c e, o p t i o n A i s c o r r e c t a n s w e r . \end{matrix}$

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