Question

Calculating the Speed
Bianca walked 21 centimeters in 7 minutes. Michelle walked 24 centimeters in 4 minutes. Sierra walked 18 centimeters in 6 centimeters.

Which turtle has the fastest speed?

The speed of a turtle can be found by
dividing
distance by time.

is the fastest turtle.
The speed of the fastest turtle is
centimeters per minute.

Answer 1

To find out which turtle has the fastest speed, we will calculate the speed of each turtle using the formula:

\[
\text{Speed} = \frac{\text{Distance}}{\text{Time}}
\]

Let's calculate the speed for each turtle:

1. **Bianca:**
- Distance = 21 centimeters
- Time = 7 minutes
\[
\text{Speed} = \frac{21 \text{ cm}}{7 \text{ min}} = 3 \text{ cm/min}
\]

2. **Michelle:**
- Distance = 24 centimeters
- Time = 4 minutes
\[
\text{Speed} = \frac{24 \text{ cm}}{4 \text{ min}} = 6 \text{ cm/min}
\]

3. **Sierra:**
- Distance = 18 centimeters
- Time = 6 minutes
\[
\text{Speed} = \frac{18 \text{ cm}}{6 \text{ min}} = 3 \text{ cm/min}
\]

Now, summarizing the speeds:
- Bianca: 3 cm/min
- Michelle: 6 cm/min
- Sierra: 3 cm/min

From these calculations, **Michelle** is the fastest turtle.

The speed of the fastest turtle is **6 centimeters per minute**.

So, the final answers are:
- **Michelle** is the fastest turtle.
- The speed of the fastest turtle is **6 centimeters per minute**.