What fraction of 2 hours is 12 seconds?

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A $\frac{1}{200}$

B $\frac{1}{300}$

C $\frac{1}{400}$

D $\frac{1}{600}$

Answer:

\frac{1}{600}

2 hours = $2\times{60}$ min

= 120 min = $120\times{60}$ = 7200 sec

∴ Required fraction = $\frac{12}{7200}$

$=\frac{1}{600}$

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