A person has a biofuel car, which runs on natural gas vehicle (NGV) and gasoline. The performance of the car, measured in km/m$^3$, in the case of gas, or measured in km/L, in the case of gasoline, depends, among other factors, on the speed, in km/h, at which the car travels. This relationship is in accordance with the graphs. During a holiday, this person took a 240 km trip. To obtain an estimate of fuel consumption, assume that throughout the journey a constant speed of $60\,\mathrm{km/h}$ was maintained. Consider that, during half of the journey, only NGV was used and, in the other half, only gasoline. What was paid per cubic meter of NGV and per liter of gasoline corresponded, respectively, to R\$ 2.00 and R\$ 3.00. What was the difference, in reais, between the total expenses with gasoline and with NGV? (A) 4 (B) 8 (C) 14 (D) 21 (E) 30
A person has a biofuel car, which runs on natural gas vehicle (NGV) and gasoline. The performance of the car, measured in km/m$^3$, in the case of gas, or measured in km/L, in the case of gasoline, depends, among other factors, on the speed, in km/h, at which the car travels. This relationship is in accordance with the graphs.
During a holiday, this person took a 240 km trip. To obtain an estimate of fuel consumption, assume that throughout the journey a constant speed of $60\,\mathrm{km/h}$ was maintained. Consider that, during half of the journey, only NGV was used and, in the other half, only gasoline. What was paid per cubic meter of NGV and per liter of gasoline corresponded, respectively, to R\$ 2.00 and R\$ 3.00.
What was the difference, in reais, between the total expenses with gasoline and with NGV?\\
(A) 4\\
(B) 8\\
(C) 14\\
(D) 21\\
(E) 30