The train traveled at a speed of 90 miles per hour for 3 hours then slowed down to 72 miles per hour for the next 1 1/2 hours. What is the total number of miles the train traveled?

378 miles

Step-by-step explanation:

Remember that (rate) (distance) = time

The train is going 90 mph for 3 hours. That's 270 miles in 3 hours.

Then you would multiply 72 (mph) by 1 1/2 (hours) and get 108 miles traveled in 1 1/2 hours.

Add those together and you get 378.