To find the rate at which Sam walked, we can use the formula \( r = \frac{d}{t} \), where \( r \) is the rate, \( d \) is the distance, and \( t \) is the time.
- Distance (d): 6 kilometers
- Time (t): 50 minutes
Now, substituting into the formula:
\[ r = \frac{d}{t} = \frac{6 \text{ kilometers}}{50 \text{ minutes}} = \frac{6}{50} \text{ kilometers per minute} \]
Calculating \( \frac{6}{50} \):
\[ r = 0.12 \text{ kilometers per minute} \]
So, the rate at which Sam walked is 0.12 kilometers per minute.
The correct response is:
0.12 kilometers per minute.