Use the pythagorean theorem to find the lengths of each segment below.
segments cd and jk have lengths
segments ef and gh have lengths

distance covered by pamela in 9 l of fuel = 99km

let us apply unitary method here.

distance covered by pamela in 1 l of fuel =99/9 =11 km

now let us find distance covered by pamela if she has 12 l of fuel.

distance covered in 12 l = distance covered in 1 l of fuel * 12

we know that distance covered by here in 1 l is 11 km.

so distance covered in 12 l of fuel = 11*12 = 132 km.

the solution, from the graphing of the two lines, is (3,2), i.e., x = 3, y = 2.