Question

If a municipal reservoir containing 489.0 acre-feet of water is drained at a rate of 2000.0 gallons every hour, how many days will it take to completely empty the reservoir

Answer 1

I asked Google to convert 489 acre-feet to gallons and Google came up with 1.593e+8 gallons. So 1.593e8 gallons x 1 hr/2000 gallon x (1 day/24 hr) = ? days.
BTW this look much more like a math problem than a chemistry problem. oobleck should check this out.

Answer 2

1 acre-foot is 43560 ft^3
so,
489*43560 ft^3 * 7.48gal/ft^3 * 1hr/20000gal * 1day/24hr = 331.938 days

Answer 3

1.593e8 gallons x 1 hr/2000 gallon x (1 day/24 hr) = 3319 days.
489*43560 ft^3 * 7.48gal/ft^3 * 1hr/20000gal * 1day/24hr = 331.938 days
oobleck made a typo and entered 20,000 gallons/hr and not 2000 gallons/hr so his corrected answer is 3319 days also.

Answer 4

dang - I missed that pesky decimal point.
Muchas gracias, DrBobxxx

Answer 5

There is nothing like a good ol' pesky decimal point.