mile-to-hour unit rate

Question

Train A travels 390 miles in 6 hours and train B travels 420 miles in 7 hours. Find the mile-to-hour unit rate for trains A and B and compare their speed.

Answer 1

When finding the mile-to-hour unit rate, we are looking to see how many miles in only ONE hour.

 

For train A

 

390 miles / 6 hours = 65 mph

 

 

For train B

 

420 miles / 7 hours = 60 mph

 

Train A is faster than train B by 5 mph.