Question 948246
Rate x Time = Distance.
{{{R*t=D}}}
Time going to,
{{{(10+2)t[1]=27}}}
{{{t[1]=27/12}}}
Time coming back,
{{{(10-2)t[2]=27}}}
{{{t[2]=27/8}}}
So then the total time,
{{{t=t[1]+t[2]}}}
{{{t=27/12+27/8}}
{{{t=54/24+81/24}}}
{{{t=135/24}}}
{{{t=45/8}}}{{{hr}}}