human
Question: A bus traveled 280 kilometers between two cities. It left the first city at 3:00 p.m. and arrived at the second city at 7:00 p.m. What was the average speed of the bus during the trip?

Choices:
A) 4 km/h
B) 40 km/h
C) 70 km/h
D) 280 km/h
gpt
The correct answer is 2: 70 km/h.