Fred and Sam are standing 55 miles apart and they start walking in a straight line toward each other at the same time. If Fred walks at a constant speed of 6 miles per hour and Sam walks at a constant speed of 5 miles per hour, how many miles has Sam walked when they meet?
Select:
A) 5 B) 9 C) 25 D) 30 E) 45
relative distance =55 miles   relative speed =6+5= 
<gadget id="calculator">6+5</gadget>
<output>11</output>
11 miles per hour   time taken=55/11= 
<gadget id="calculator">55/11</gadget>
<output>5</output>
5 hours   distance travelled by sam=5*5= 
<gadget id="calculator">5*5</gadget>
<output>25</output>
25 miles=25
<result>C</result>
Fred and Sam are standing 55 miles apart and they start walking in a straight line toward each other at the same time. If Fred walks at a constant speed of 6 miles per hour and Sam walks at a constant speed of 5 miles per hour, how many miles has Sam walked when they meet?