(a)
We are given
Amelia used 6 liters of gasoline to drive 48 kilometers
so, we have
6 litres = 48 kilometers
we can divide both sides by 6


so, we get

(b)
now, we have to find number of litres after 11 km
6 litres = 48 kilometers
we can also write it as
48 kilometers=6 litres
we can divide both sides by 48


we can multiply both sides by 11

..................Answer