A train travels at 80 miles per hour for 2.5 hours, then slows to 60 miles per hour for 1.5 hours. What is the total distance traveled?

Distance is rate times time for each leg. The first leg is $80\cdot2.5=200$ miles. The second leg is $60\cdot1.5=90$ miles. The total distance is $200+90=290$ miles, choice H. Choice F ($200$) includes only the first leg. Choice G ($210$) uses $1.5$ hours for both legs, $80(1.5)+60(1.5)=120+90$. Choice J ($350$) uses $2.5$ hours for both legs, $200+150$. Each speed must be matched with its own time, and the two distances are then added.