Two friends plan to walk along an 18-km trail, starting at opposite ends of the trail at the same time. If Friend P's rate is 25% faster than Friend Q's, how many kilometers will Friend P have walked when they pass each other?  Choose the correct choice from the following choices:  A) 10  B) 11  C) 12  D) 13  E) 14
If Q complete x kilometers, then P completes 1.25x kilometers.   x + 1.25x = 18   2.25x=18   x = 8   Then P will have have walked   1.25*8= 
<gadget id="calculator">  1.25*8</gadget>
<output>10</output>
10 km.   The answer is 10.
<result>A</result>
Two friends plan to walk along an 18-km trail, starting at opposite ends of the trail at the same time. If Friend P's rate is 25% faster than Friend Q's, how many kilometers will Friend P have walked when they pass each other?