And inlet pipe on a swimming pool can be used to fill the pool and 26 hours. The drain pipe can be used in the pool in 30 hours. If the pool is 2/5 filled and then the inlet pipe and drain pipe are open, how long from that time will it take to fill the pool?

24 hours

Step-by-step explanation:

step-by-step explanation:

the original amount doesn't ''re just looking for the time it takes for 1/2 of the substance to we have

(1/2) =)     take the ln   of both sides

ln (1/2)   = )   and we can write

ln(1/2) = ) lne     and lne   = 1     so we have

ln(1/2) = -.1092t     divide both sides by -.1092

t = ln(1/2)/-.1092 = about 6.347 days = about 6.3 days (rounded)

19

step-by-step explanation: