Question 986214
RT=D relates rate, time, and distance.
Each distance covered is one term.


Total Time,
{{{100/30+100/40+100/50}}}
{{{10/3+10/4+2}}}
LCD is 3*4
{{{40/12+30/12+24/12}}}
{{{94/12}}}
{{{47/6}}} hours


Total Distance,
{{{100+100+100=300*km}}}


{{{Average Speed, 300/(47/6)}}}
{{{300*6/47}}}
{{{highlight((38&1/3)(km/hour))}}}