Two friends plan to walk along a 43-km trail, starting at opposite ends of the trail at the same time. If Friend P's rate is 15% faster than Friend Q's, how many kilometers will Friend P have walked when they pass each other? Pick one:
A) 21  B) 21.5  C) 22  D) 22.5  E) 23
If Q complete x kilometers, then P completes 1.15x kilometers.   x + 1.15x = 43   2.15x=43   x = 43/2.15= 
<gadget id="calculator">43/2.15</gadget>
<output>20</output>
20   Then P will have have walked   1.15*20= 
<gadget id="calculator">  1.15*20</gadget>
<output>23</output>
23 km.   The answer is 23.
<result>E</result>
Two friends plan to walk along a 43-km trail, starting at opposite ends of the trail at the same time. If Friend P's rate is 15% faster than Friend Q's, how many kilometers will Friend P have walked when they pass each other?