Question

The speedometer in Kevin’s car reads in both miles/hour and kilometers/hour. What information is needed to convert between these two units?

the number of miles in 1 kilometer
the number of kilometers that are traveled in 1 hour
the number of miles that are traveled in 1 hour
the number of hours per 1 kilometer

Answer 1

You need the number of miles per kilometer, or vice versa.

Answer 2

In this problem, the speedometer reads two speed units: miles per hour and kilometers per hour. In this case, to convert one to the other, one has to convert miles to kilometers. Hence the information needed in this problem is A. the number of miles in 1 kilometer.