To find the total number of kilometers Charlene runs, you need to consider both the distance she runs each day and the number of days she runs each week.
Charlene runs 5 kilometers each day for 5 days a week, so in one week, she runs:
\[ \text{Total kilometers in one week} = 5 \text{ km/day} \times 5 \text{ days/week} = 25 \text{ km/week} \]
If \( W \) represents the number of weeks she trains, the total distance \( K \) that she runs after \( W \) weeks can be expressed as:
\[ K = 25W \]
Thus, the correct equation to find the number of kilometers she has run is:
B. K = 25W
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