Problema Solution
two water pipes together can fill a certain tank in 8.4 hours. The smaller pipe alone takes 2.5 hours longer than the larger pipe to fill the same tank. How long would it take the larger pipe alone to fill the tank?
Answer provided by our tutors
let
x = the time the larger pipe needs to fill the tank alone
x + 2.5 = the time the smaller pipe need to fill the tank alone
two water pipes together can fill a certain tank in 8.4 hours
1/x + 1/(x + 2.5) = 1/8.4
by solving we find
x = 15.64 hr
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the larger pipe needs 15.64 hours to fill the tank alone.