Question

Dana bikes 10 mi in 50 min.



At this rate, how far can she bike in 90 min?

Answer 1

the answer will be 18 miles

Answer 2

18 miles in 90 minutes. If you think about it she's going 1 mile every 5 minutes. So if she biked 10 miles in 50 she would have hone 8 miles in 40 minutes. You now simply add 10 miles + 8 miles and you end up with 18 miles.