Charlene is training for a marathon. She runs 5 kilometers per day for 5 days each week. If K stands for the total number of kilometers she runs and W stands for the number of weeks she trains, which equation can be used to find the number of kilometers she has run?

Question

A.
W = 25K

B.
K = 25W

C.
W = 5K

D.
K = 5W

Answer 1

To determine the correct equation for the total number of kilometers Charlene runs, we can analyze the information provided:

• She runs 5 kilometers per day.
• She trains for 5 days each week.

First, let's calculate the total number of kilometers she runs in one week.

In one week:

• Total kilometers = kilometers per day × number of days per week
• Total kilometers = 5 km/day × 5 days/week = 25 km/week

If we let W represent the number of weeks she trains, then the total number of kilometers K she runs can be expressed as:

• K = total kilometers per week × number of weeks
• K = 25 km/week × W

Thus, the correct equation to express the total number of kilometers K in terms of weeks W would be:

K = 25W

However, this specific equation is not one of the answer options. The closest correct interpretation, however, based on the choices given, and the relationship established, is:

B. K = 25W

So the answer is B. K = 25W.