About 16.8 gallons.
420 miles / 25 miles per gallon = 16.8 gallons
$333.33
(835 miles) x (1 gallon/20 miles) x (3.75 bux/gallon) = $ 156.56
$533.33
$211.20
(1,100 miles) x (1 gallon/28 miles) x ($4/gallon) = $157.143 (rounded)
40 gallons !
12.5 gallons
31.81 gallons.
46.6 gallons.
32 gallons
48 gallons
Divide the number of miles by miles per gallon = 1200 / 32 = 37.5 gallons.
Around 54 gallons
35.2381 Gallons of Gasoline.
600 miles at 13 miles per gallon = 600/13 gallons = 46.15 gallons.
1600 miles at 28 miles/gallon = 1600/28 gallons = 57.14 gallons (approx)
$66.50