# An aircraft carrier made a trip to Guam and back. The trip there took three hours and the trip back four hours. It averaged 6 km/h on the return trip. What is the average speed of the trip there?

Mar 21, 2018

The average speed is 8.0 km/h

#### Explanation:

We use the data for the return journey to calculate the distance travelled using the constant velocity equation:
$s = v t = 6 \cdot 4 = 24$ km

Note I didn't change any units so the answer comes out in kilometres.

Now use the distance and time taken to travel to Guam to find the average speed:
$v = \frac{s}{t} = \frac{24}{3} = 8.0$ km/h