ExplanationSince the rate of the leak is given in ounces per seconds, figure out how many seconds are in the 8 hours between 12:00 noon and 8:00 pm:

\(8 hours \times \frac{60 minutes}{1 hour} \times \frac{60 seconds}{1 minute} = 28,800 seconds\).

Let number of ounces leaked in 8 hours be x.

\(\frac{Ounces:}{Seconds:}= \frac{0.5}{1} =\frac{y}{28,800}\)

\((0.5)(28,800) = (1)x\)

So x = 14,400.

So in 8 hours, the tank could lose 14,400 ounces, the answer must be all choices less than 14,400. Only the last choice, 15,360, is impossible because it would take longer than 8 hours to leak this many ounces.

Hence option A, B, C and D are correct.
_________________

Sandy

If you found this post useful, please let me know by pressing the Kudos Button

Try our free Online GRE Test