If 90% of $x$ is 315 km, then the value of $x$ will be _____.

350 k m

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325 k m

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320 k m

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340 k m

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Solution

The correct option is A $350 k m$
We have, 90% of $x$ = 315 km
$\Rightarrow \frac{90}{100} \times x = 315 \Rightarrow x = \frac{315 \times 100}{90} = \frac{315 \times 10}{9} = 350 \Rightarrow x = 350 k m$

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