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Two cyclists, k km apart, and starting at the same time, would be together In r hours if they travelled in the same direction, but would pass each other In t hours if they travelled in opposite directions. The ratio of the speed of the faster cyclist to that of the slower is ____
$\frac{r + t}{r - t}$
$\frac{r}{r - t}$
$\frac{r + t}{r}$
$\frac{r}{t}$

A

\frac{r}{r - t}

B

\frac{r + t}{r}

C

\frac{r}{t}

D

\frac{r + t}{r - t}

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