The current in a river is 6 mph. A boat can travel 20 mph in still water. How far up the river can the boat travel if the round trip is to take 10 hours?	Choose the correct choice from the following
A) 69 miles  B) 88 miles  C) 96 miles  D) 91 miles  E) 112 miles
Upstream Speed = 20-6= 
<gadget id="calculator">20-6</gadget>
<output>14</output>
14 mph   91 milesownstream Speed= 20+6= 
<gadget id="calculator">20+6</gadget>
<output>26</output>
26 mph   91 miles/14 + 91 miles/26= 10 hours   Solving for 91 miles we get 91 miles=91   Answer: 91 miles
<result>D</result>
The current in a river is 6 mph. A boat can travel 20 mph in still water. How far up the river can the boat travel if the round trip is to take 10 hours?