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?

1 Answer
Mar 21, 2018

The average speed is 8.0 km/h


We use the data for the return journey to calculate the distance travelled using the constant velocity equation:
#s=vt = 6*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 = s/t = 24/3 = 8.0# km/h