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jmc

prealgebra junior

Problem

When Walter drove up to the gasoline pump, he noticed that his gasoline tank was 1/8 full. He purchased 7.5 gallons of gasoline for 10 dollars. With this additional gasoline, his gasoline tank was then 5/8 full. The number of gallons of gasoline his tank holds when it is full is
(A)
(B)
(C)
(D)
Solution
The tank started at full, and ended at full. Therefore, Walter filled of the tank. If Walter fills half the tank with gallons, then Walter can fill two halves of the tank (or a whole tank) with gallons, giving an answer of
Final answer
D