it will take beth 280 mins to walk 10 miles
Beth can walk 2 1/2 miles in 28 minutes
Multiply both by 2
2 1/2 x 2= 5
28 x 2 = 56
Beth can walk 5 miles in 56 minutes
Next, multiply both by 2 again
5 x 2 = 10
56 x 2 = 112
Beth takes 112 minutes to walk 10 miles
hope this helps
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