Question 966882


The first pipe fills  {{{1/8}}}  of the tank volume in  1 minute.


The second pipe fills  {{{1/12}}}  of the tank volume in the same time.


Working together,  the two pipes fill  {{{1/8}}} + {{{1/12}}} = {{{3/24}}} + {{{2/24}}} = {{{5/24}}}  of the tank volume in  1 minute.


Hence,  it will take  {{{24/5}}} minutes for both pipes to fill the tank. 

It is equal to  {{{4}}}{{{4/5}}}  minute =  4  minutes and  48  seconds.