Question

This morning, Sam walked 4 kilometers in 50 minutes. At what rate did Sam walk?

Use the formula r = d/t where r, is the rate, d is the distance, and t is the time.

A. 12.5 kilometers per minute
B. 46 kilometers per minute
C. 200 kilometers per minute
D. 0.08 kilometers per minute

Answer 1

To find the rate at which Sam walked, we can use the formula \( r = \frac{d}{t} \), where:

- \( d \) is the distance (4 kilometers)
- \( t \) is the time (50 minutes)

First, we need to plug in the values into the formula:

\[
r = \frac{4 \text{ kilometers}}{50 \text{ minutes}} = \frac{4}{50} \text{ kilometers per minute}
\]

Now, simplifying \( \frac{4}{50} \):

\[
r = \frac{4}{50} = \frac{2}{25} = 0.08 \text{ kilometers per minute}
\]

Therefore, the rate at which Sam walked is \( 0.08 \) kilometers per minute.

The correct answer is:

**D. 0.08 kilometers per minute**