sandy wrote:
While driving from city A to city B, a car got 22 miles per gallon and while returning on the same road, the car got 30 miles per gallon.
Quantity A |
Quantity B |
The car’s average gas mileage for the entire trip, in miles per gallon |
\(26\) |
A) Quantity A is greater.
B) Quantity B is greater.
C) The two quantities are equal.
D) The relationship cannot be determined from the information given.
50% wrong means that most are straightway taking the average of two mileagesThat is going to be wrong, as it will be wrong for average speed question too..
When you are travelling same distance in two different speeds or different mileage, the average of total will always be LESS than the arithmetic mean of the two
so here B is the mean, so will be greater than A..
The best way would be to take the LCM of two speeds or mileage as the distance one way as also shown above by Happymathtutor.
so LCM of 22 and 30 is 330...
1) fuel used while going = 330/22=15
2) fuel used while returning = 330/30=11
distance = 330+330=660
fuel used = 15+11=26
Average = 660/26 = 25.38 <26
hence B>A