Working together, two pumps can drain a certain pool in 3 hours. If it takes the older pump 13
hours to drain the pool by itself, how long will it take the newer pump to drain the pool on its own?
Do not do any rounding.

Question

Working together, two pumps can drain a certain pool in 3 hours. If it takes the older pump 13
hours to drain the pool by itself, how long will it take the newer pump to drain the pool on its own?
Do not do any rounding.

dayakar · Answer

let the new pump  takes to drain the pool  = x hr
in 1hr the new pump drain the part of the pool = 1/x------(1)

can u do the same for older pump?