A car traveled 462 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?
14
16
21
22
27
(462-336)/6=21 即满缸油量为21gallon
336/21=16 miles/gallon in the city
没看懂题;原来是说一tank的gasoline可以跑多远;不如设n为每tank多少加仑的gasoline
算出来不够,还要再往下多做一步
设每箱有n加仑。462/n-336/n=6, n=21
每加仑的公里数=每箱的公里数/每箱的加仑数=336/21=16
highway 一箱油跑462,city一箱油跑336
city比highway一加仑少跑6
462-336得出总共少跑126,126/6=21加仑,表示一箱油有21加仑
336/21=16得出city中每加仑跑21
X/336 = 6/(462 - 336)
b