It's simple. It takes Chloe 4 minutes per 1 mile. Now we have to think how many miles would it take for 1 hour. In order to find that answer you have to think what times 4 equals 60(because 60 is equivalent to an hour) Anyways 4 times 15 equal 60.
4 minutes = 1 mile
8 = 2
12 = 3
16 = 4
20 = 5
24 = 6
28 = 7
32 = 8
36 = 9
40 = 10
44 = 11
48 = 12
52 = 13
56 = 14
60 minutes = 15 miles is the answer