Question 1099820
Rate x Time = Output
.
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{{{R[1]*15=1}}}
{{{R[1]=1/15}}}
.
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{{{R[2]*10=1}}}
{{{R[2]=1/10}}}
So then together,
{{{(R[1]+R[2])*t=1}}}
{{{(1/15+1/10)*t=1}}}
{{{(10/150+15/150)*t=1}}}
{{{(25/150)t=1}}}
{{{(1/6)t=1}}}
{{{t=6}}}
6 hours working together