Simple average speed problem
This should be very easy, I have a feeling I'm missing soemthing obvious as the web form won't accept any of my answers.
"A jet takes off from SFO (San Francisco, CA) and flies to ORD (Chicago, IL). The distance between the airports is 3000 km. After a 1h layover, the jet returns to San Francisco. The total time for the roundtrip (including the layover) is 9 h, 34 min. The westbound trip (from ORD to SFO) takes 26 more minutes than the eastbound portion.
What is the average speed for the overall trip? (Express your answer to three significant figures.)"
so 9 hours 34 mins = 9.57 hours. 3000km/9.57h= 313.48 km/h. But the web form won't accept this answer nor rounding to 313, 313.5, or 314.
