1.Ok so there a 60 minutes within an hour but we have only flown for 20 so we will be dividing by 3 since 60 divided by 20 = 3
240 km divided by 3 = 80
So you flew about 80 km per every 20 min
2.
14.6 -9.8 = 4.8
4.8 + 5.3= 10.1
Bob is 10.1 miles away from home.