A freight train is carrying goods across the country. The number of gallons of fuel it has used varies directly with the distance it has traveled.

20 gallon in 50 miles
40 gallon in 100 mile
60 gallon in 150 miles

how many miles do the train travel per gallon?

Question

A freight train is carrying goods across the country. The number of gallons of fuel it has used varies directly with the distance it has traveled. 

20 gallon in 50 miles
40 gallon in 100 mile
60 gallon in 150 miles


how many miles do the train travel per gallon?

anonymous · Answer

@Basher @mayankdevnani @tester97 @mathmetics

mayankdevnani · Answer

use UNITARY METHOD.

anonymous · Answer

i don't know what that is @mayankdevnani

mayankdevnani · Answer

first,take the first Case:-
$$\large \bf 20~ gallons~--->50~miles$$
so,$$\large \bf 1 ~gallon--->\frac{50}{20}=\frac{5}{2}=2.5~miles=\color{red}{Answer}$$

mayankdevnani · Answer

understood? @sunnycali

anonymous · Answer

yes the answer is 2.5

mayankdevnani · Answer

and then take second case :_
In all the cases,you will get same answer