Delta drives an average speed of 17 miles per hour through traffic. What is her kilometers per hour if 1 kilometer is approximately equal to 0.62 miles? Round to the nearest tenth of a kilometer.

a. 27.4
b. 2.7
c. 10.5
d. 17.6

1 answer

To convert Delta's speed from miles per hour to kilometers per hour, we can use the conversion factor where 1 kilometer is approximately equal to 0.62 miles.

First, we need to find out how many kilometers are in 17 miles. We can use the conversion factor:

\[ \text{km} = \text{miles} \times \frac{1 \text{ km}}{0.62 \text{ miles}} \]

Now, substituting the value:

\[ \text{km} = 17 \text{ miles} \times \frac{1 \text{ km}}{0.62 \text{ miles}} \approx 27.41935484 \text{ km} \]

Rounding to the nearest tenth, we get:

\[ \text{km} \approx 27.4 \]

Thus, her speed in kilometers per hour is approximately 27.4 km/h.

The correct answer is:

a. 27.4