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 12 miles per gallon, and from Town B to Town C, the car averaged 16 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?	Choose the correct choice:	A) 13	B) 13.5	C) 14.4	D) 14.5	E) 15
Ans is 14.4   Given d_ab = 2*d_bc   let d_ab = d and d_bc = x so d=2x   for average miles per gallon = (d+x)/((d/12)+(x/16)) = 14.4 (formula avg speed = total distance/ total time)
<result>C</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 12 miles per gallon, and from Town B to Town C, the car averaged 16 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?