What is the average speed of the trip there?

Question

An aircraft carrier made a trip to Guam. The trip there took three hours and the trip back took four hours. It averaged 6 km/h on the return trip.

Answer 1

distance = speed * time

distance for return  = 6km/hr * 4 hours = 24km

 

the distance is the same between the 2 points

speed = distance / time so 24km divided by 3 hrs  gives 8 km/hr the average speed going.

 

 

the average speed of the trip there is 8km/hr

Answer 2

On the return trip the carrier went 6 km/h for four hours. It covered 24 km (half of the trip)

The entire trip was 48 km done in 7 hours.

The average speed was 48/7 or 6.86 km/h.