Which conversion factors are used to multiply to 12 m/s to get kilometers per minute?

To answer this question, you need to understand how to convert a unit. In this case, the conversion would be meter to kilometer then per second into per minute. The conversion rate for m into km is 1/1000. The conversion rate for / s into / m would be 60/1.

Then the conversion rate would be 60/1000. In this case, 12 * 60/1000 = 0.72km/min