If the average speed of an orbiting space shuttle is 27800 km/h, determine the time required for it to circle Earth. Assume that the shuttle is orbiting about 320.0 km above Earth's surface, and the Earth's radius is 6380 km.
This is high school physics question.
I used average velocity formula to solve this problem. I used radius to find circumference. My answer is 1.44 hours. Answer in the back of book is 1.51 hours
I didn't use 320 km information provided.
Did I solve this problem correctly ?