Question 1200124
You can write a basic work rates rule from the IF clause, or just go straight to one cats work rate is  {{{1/5}}}, in RAT/MINUTES.



How many cats, n, catch 72 rats in 2 hours?
2 hours is 120 minutes.

{{{n(1/5)*120=72}}}

{{{n=72(5/120)}}}

{{{highlight(n=3)}}}