GRE Question of the Day (August 12)

A distillate flows into an empty 64-gallon drum at spout A and out of the drum at spout B. If the rate of flow through A is 2 gallons per hour, how many gallons per hour must flow out at spout B so that the drum is full in exactly 96 hours?

(A) \({\frac{{3}}{{8}}}\)

(B) \({\frac{{1}}{{2}}}\)

(C) \({\frac{{2}}{{3}}}\)

(D) \({\frac{{4}}{{3}}}\)

(E) \({\frac{{8}}{{3}}}\)

Correct Answer - D - (click and drag your mouse to see the answer)