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+//Example 11-2 Effect of Frontal Area on Fuel Efficiency of a Car
+W = 1.85 //width of the car [m]
+H = 1.70 //height of the car [m]
+C_D = 0.30 //drag coefficient
+H_new = 1.55 //changed height of the car [m]
+L = 18000 //running of vehicle per year [km]
+V = 95 //average speed of car [km/h]
+rho = 0.74 //density of gasoline [kg/L]
+price = 0.95 //price of gasoline [$/L]
+rho_air = 1.2 //density of air [kg/m^3]
+HV = 44000 //heating value of gasoline [kJ/kg]
+eta = 30 //overall-efficiency of car's drive train [%] \ No newline at end of file