The hikers slogged 10miles through the muck in 5 hours then they came to the pavement and were able to triple their rate. how long would it take them to cover 24 miles on the pavement

If the hikers slogged 10 miles in 5 hours through the muck, it means they "walk" 10/5= 2 miles/hour,
on the pavement they triple their rate, so they would go 2*3= 6 miles/hour
24/6=4 hours, they need 4 hours to cover 24 miles