A certain car traveled twice as many miles from Town A to Town B as it did from Town B to Town C. From Town A to Town B, the car averaged 10 miles per gallon, and from Town B to Town C, the car averaged 12 miles per gallon. What is the average miles per gallon that the car achieved on its trip from Town A through Town B to Town C?	Pick one.
A) 11.5 B) 9.5 C) 13.5 D) 10.6 E) 14.5
step 1) took LCM of 10 and 12.. came as 30. just multiplied by 10...(to make easy calculation)   step 2) 300 distance between B to C... do 300/12 hence 25 gallons used   step 3) twice distance.. hence 300*2= 600... do as above.. 600/10= 60 gallons used   step 4) total gallons.. 25+60=85 gallons   step ) total miles= 300+600= 
<gadget id="calculator">300+600</gadget>
<output>900</output>
900 miles   hence.. average of whole journey= 900/85 which comes to 10.6   Answer : 10.6
<result>D</result>
A certain car traveled twice as many miles from Town A to Town B as it did from Town B to Town C. From Town A to Town B, the car averaged 10 miles per gallon, and from Town B to Town C, the car averaged 12 miles per gallon. What is the average miles per gallon that the car achieved on its trip from Town A through Town B to Town C?