Question 903387
______________rate_________time_________distance
_______________r___________3____________r*3=d
before interr___r___________1_____________r*1
after interr____r+1_________1_____________(r+1)*1
-
-
Sum of before and after interruption d distance.
{{{r+(r+1)=d}}}
{{{2r+1=d}}}


Expected regular travel {{{r*3=d}}};


{{{2r+1=r*3}}}, equating the distance
{{{1=1*r}}}
{{{highlight(r=1)}}}-----walking speed, before interruption.


{{{r*3=d}}}
{{{d=3r}}}
{{{d=3*1}}}
{{{highlight(d=3)}}}-----travel distance.