Question 205065

Speed x Time =  Distance


Clarke family's speed, times their time = Rourke family's speed, times their time, less 20

 
Clarke family's speed (6 k/hr)


Clarke family's time (Let it be T)


Rourke family's speed (14 k/hr)


Rourke family's time (T - same as Clarke family's)


D(ST)  =  D(ST)


6(T)  =  14(T) - 20  


- 8T  =  -  20


T, or time each family spent on their boat trip was: {{{(-20)/(-6)}}}  =  {{{highlight_green(2.5)}}} hours.