A certain car averages 25 miles per gallon of gasoline when driven in the city and 40 miles per gallon when driven on the highway. Acording to these rates, which of the following is the closest to the number of miles per gallon the car averages when driven 10 miles in the city and 50 miles on the highway?
a) 28
b) 30
c) 33
d) 36
e) 38
I have:
[ (25 mpg * 10 miles) + (40 mpg * 50 miles) ] / (10 + 50 miles)
(250 + 2000)/60
2250/60
37.5 miles per gallon, and therefore answer choice e.
OA is d. Where am I going wrong?
a) 28
b) 30
c) 33
d) 36
e) 38
I have:
[ (25 mpg * 10 miles) + (40 mpg * 50 miles) ] / (10 + 50 miles)
(250 + 2000)/60
2250/60
37.5 miles per gallon, and therefore answer choice e.
OA is d. Where am I going wrong?
