Jethro walked 3 miles per hour for 2 hours. So you would want to do 3 x 2.
That equaling 6. So Jethro walked a total of 6 miles in two hours.
Randy walked 4 miles per hour for 3 hours. So you would want to do 4 x 3.
That equaling 12. So Randy walked a total 12 miles in three hours.
If you add 6 miles and 12 miles the boys would have walked a total of 18 miles together.
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