 |
| ||
| |||
|
| Math Central | Quandaries & Queries |
|
Question from Aaron, a student: I can't do this math problem. please help. |
Hi Aaron,
You have three fractions
\[\frac{200 \mbox{ m}}{1 \mbox{ min}} \times \frac{60 \mbox{ min}}{ 1 \mbox{ hr}} \times \frac{1 \mbox{ km}}{1000 \mbox{ m}}.\]
Since there are 60 minutes in an hour the middle fraction reduces to 1 with no units. The remaining numeric values reduce to $\large \frac15$ and the two units of metres cancel so you are left with
\[\frac15 \frac{\mbox{ km}}{\mbox{ min.}}\]
But the choices for answers have the units km/hr or m/hr. How do you convert km/min to km/hr or m/hr?
Penny
| ||
| ||
| ||
 |
 |
|
Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences.