A car traveled 340 miles per tankful of gasoline on the highway and 336 miles per tankful of gasoline in the city. If the car traveled 6 fewer miles per gallon in the city than on the highway, how many miles per gallon did the car travel in the city?	Pick one:
A) 504  B) 416  C) 321  D) 220  E) 170
Let the speed in highway be h mpg and in city be c mpg.   h = c+6   h miles are covered in 1 gallon   340 miles will be covered in 340/h.   Similarly c miles are covered in 1 gallon   336 miles will be covered in 336/c.   Both should be same (as car's fuel capacity does not change with speed)   =&gt; 336/c = 340/h   =&gt; 336/c = 340/(c+6)   =&gt; 336c+336*6=340c   =&gt;c=336*6/4= 
<gadget id="calculator">336*6/4</gadget>
<output>504</output>
504   504nswer 504.
<result>A</result>
A car traveled 340 miles per tankful of gasoline on the highway and 336 miles per tankful of gasoline in the city. If the car traveled 6 fewer miles per gallon in the city than on the highway, how many miles per gallon did the car travel in the city?