Bunuel wrote:
Water started leaking from a tank yesterday at 12:00 noon at a constant rate of 0.5 ounce per second and continued leaking at this rate until the tank was empty. If the tank was empty at 8:00 yesterday evening, which of the following was the amount of water in the tank, in ounces, yesterday at 12:00 noon?
A. 1,280
B. 6,480
C. 10,240
D. 14,400
E. 15,360
Recall that there are 3600 seconds in one hour; thus, in 8 hours, we have 3600 x 8 seconds. We can create the equation:
0.5 x 3600 x 8 = n
14,400
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