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)