Question 1198710
<br>
The ratio of the two distances is 80:4 = 20:1, and the ratio of the rates is 10:1.  That means the ratio of the two times is 20:10 = 2:1.<br>
The total times was 3 hours; so the camper spent 2 hours driving and 1 hour hiking.<br>
The camper hiked 4 miles in 1 hours, so his speed was 4 miles per hour.<br>
ANSWER: 4mph<br>