A. 26.4/400 = x/100
400x = 2640
x = 2640/400
x = 6.6 L / 100 km
B. 42.5 / 500 = x/100
500x = 4250
x = 4250/500
x = 8.5 L / 100 km
C. 25.9/350 = x/100
350x = 2590
x = 2590/350
x = 7.4 L / 100 km
D. 43.2/450 = x/100
450x = 4320
x = 4320/450
x = 9.6 L / 100 km
most fuel efficient is car A
to travel 900 km....
A = 6.6 * 9 = 59.4 L
B = 8.5 * 9 = 76.5 L
C = 7.4 * 9 = 66.6 L
D = 9.6 * 9 = 86.4 L
