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tom training for a marathon he currently can run 12 miles in 3 hours. how long will it take tom to run 20 miles?

tom training for a marathon he currently can run 12 miles in 3 hours. how long will it take tom to run 20 miles?

Answer:Tom will take 5 hoursStep-by-step explanation:Unit RateTom runs 12 miles in 3 hours. We can calculate two different unit rates:12 miles / 3 hours = 4 miles/hour3 hours / 12 miles = 0.25 hours/mileThe first rate measures how many miles Tom runs per hour. The second rate measures how long it takes to Tom to run one mile.We are asked to find the time needed for Tom to run 20 miles, thus the second rate will be useful:0.25 hours/mile * 20 miles = 5 hoursTo run 20 miles, Tom will take 5 hours...

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