Question 237638
A pool can be filled in 12 hours using a pipe alone, or in 28 hours using a hose alone. if water is entering through both the pipe and the hose. How long will it take to fill the pool?
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Let x = time it takes to fill the pool with both pipes
then
x(1/12 + 1/28) = 1
x(28 + 12) = 336
x(40) = 336
x = 8.4 hours
Or, in hours and minutes
x = 8 hours and (.4 * 60) minutes
x = 8 hours and 24 minutes