Question 978267
This is uniform rates, the task is consume dog food cans.  The dogs are the agents doing the job of consuming cans of dog food.


Let r be the rate of consumption for ONE dog in CANS per DAYS.
{{{3r*1=4}}};
Three dogs each of which are consuming at the rate of r CANS per DAY for one day will eat four cans of food.


The basic formula to relate R for rate, T for time, and Q for quantity of job or task is RT=Q.


This may be enough information for you to arrange how to solve your three questions.