Step-by-step explanation: so since David hikes 60 miles in 3 days and for 240 miles we have to divided 240 by 60 and multiply 3 by how many miles we got by dividing 240 by 60 so 240 divided by 60=4 and 3 days x 4 days= 12 days so the answer is 12 days. Please mark me brainliest.
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