Please choose the correct answer to the question: The mathematical model for calculating speed is shown below. Speed = distance/time. An airplane traveled 700 kilometers in two hours during a trip. What was the average speed of the plane during the trip?

Answer1: 5.8 kilometers per hour Answer2: 350 kilometers per hour Answer3: 1400 kilometers per hour Answer4: 84,000 kilometers per hour

Answer format: answer1/answer2/answer3/answer4
Answer: answer2