Question

Our car has a 15-gallon gas tank. A lower grade of gasoline costs $2.96 per gallon. The premium grade gasoline costs
$3.15 per gallon. There are three gallons left in your gas tank. What is the difference in the cost of filling your tank between the two grades
of gasoline?
a) $2.05
b) 52.28
c) $35.52
d) $44.40

Answer 1

Answer:

The correct option is b.) $2.28

Step-by-step explanation:

i) the gas tank is of 15 gallons

ii) there are three gallons left in the gas tank

iii) therefore the tank has to be filled with 15 - 3 = 12 gallons

iv) lower grade of gasoline costs $2.96 per gallon

v) the upper grade of gasoline costs $3.15 per gallon

vi) the cost of filling the tank with the lower grade gasoline

   = 12 $\times$ 2.96 = $35.52.

vii) the cost of filling the tank with the lower grade gasoline

    = 12 $\times$ 3.15 = $37.80

viii) therefore  the difference in the cost of filling your tank between the two grades

  = $37.80 - $35.52 = $2.28

Therefore the correct option is b.) $2.28