Question

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 1

5 hours

Explanation:

because every hour she runs 4 miles so in 3 hours she will run 12 miles.

so 20 she would run 5 miles.

4 miles=1 hour

8 miles=2 hours

12 miles=3 hours

16 miles=4 hours

20 miles=5 hours.

Hope this helps have a great day:)

Answer 2

Tom will take 5 hours

Explanation:

Unit Rate

Tom runs 12 miles in 3 hours. We can calculate two different unit rates:

12 miles / 3 hours = 4 miles/hour

3 hours / 12 miles = 0.25 hours/mile



The 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 hours

To run 20 miles, Tom will take 5 hours