Question 241668
One copier can do 1/10 of the job a minute. The other one can do 1/16 in a minute

Together they can do
{{{1/10 + 1/16}}
{{{16/160 + 10/160}}}
{{{26/160}}}
{{{13/80}}} of the job per minute

How long to do the whole job?
{{{X*13/80 = 1}}}
{{{X = 80/13}}}
{{{X = 6.15}}} minutes

So the two together can do the job in about 6 minutes an 1o seconds