Some highways have one lane;others have two,three,or more.If each lane costs $10 million per mile,an economist assumes that the total benefit of a three-lane highway must be _____ million per mile.
A)less than $10
B)$10 to $20
C)$20 to $30
D)$30 or more

Question

Quizplus · Accepted Answer

Since each lane costs $10 million per mile, a three-lane highway would cost $30 million per mile. The question asks for the total benefit, not cost, of a three-lane highway. Therefore, the answer must be $30 or more million per mile, as having multiple lanes can increase the efficiency of the highway and potentially lead to economic benefits such as reduced travel times and increased productivity.

Some Highways Have One Lane;others Have Two,three,or More