Triathlete Dan runs along a 2-mile stretch of river and then swims back along the same route. If Dan runs at a rate of 10 miles per hour and swims at a rate of 8 miles per hour, what is his average rate for the entire trip in miles per minute? Choose the correct choice from the following answers.
A) 1/7 B) 2/15 C) 3/15 D) 1/4 E) 3/8
Dan travels 4 miles round trip.   Running part: (2/10 = 1/5*60= 
<gadget id="calculator">1/5*60</gadget>
<output>12</output>
12 minutes)   Swimming Part: (2/8= 1/4*60= 
<gadget id="calculator">1/4*60</gadget>
<output>15</output>
15 minutes)   4 miles in (12+15) minutes   4/27= 1/7 mile per minute   1/7nswer: 1/7 mile per minute   1/7
<result>A</result>
Triathlete Dan runs along a 2-mile stretch of river and then swims back along the same route. If Dan runs at a rate of 10 miles per hour and swims at a rate of 8 miles per hour, what is his average rate for the entire trip in miles per minute?