pipe A can fill a tank in 3 hours. if pipe B can fill the same tank in 2 hours, how many minutes will it take both pipes to fill 2/3 of the tank

Question

pipe A can fill a tank in 3 hours. if pipe B can fill the same tank in 2 hours, how many minutes will it take both pipes to fill 2/3 of the tank​

thuthuy · Answer

Answer:      48 minutes   Step-by-step explanation:   The  rate of filling  from both pipes is the  sum of the rates  in units of tanks per hour. We want the time for 2/3 of a tank.    Sum of rates  The sum of the filling rates is ...     rate A + rate B = (1/3) tank/hour + (1/2) tank/hour = 5/6 tank/hour    Fill time  The time to fill a tank or part thereof will be the number of tanks divided by the rate in tanks per hour:     time = (2/3 tank)/(5/6 tank/hour) = ((4/6)/(5/6)) hour = 4/5 hour  There are 60 minutes in an hour, so the fill time is ...     (4/5 hour)×(60 min/hour) = 48 min   It will take 48 minutes for both pipes to fill 2/3 of the tank .

linhdan · Answer

Answer:    pipe A =3.  pipe B=2    find LCM of 3 and 2  . it will be 6 . Then take 6×2/3 it will give you 4 minutes as the answer

Sum of rates

Fill time

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