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If $' x' and' y'$ vary directly, then the values of $' k' and' s'$ are

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k = 9, s = 160

k = 8, s = 120

k = 10, s = 120

k = 120, s = 8

answer is B.

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Detailed Solution

\frac{3}{36} = \frac{k}{96} and \frac{3}{36} = \frac{10}{s}

$\frac{3 \times 96}{36} = k$ $s = \frac{10 \times 36}{3}$

$k = 8$ $s = 120$

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