| A farmer owns a cow, a goat and a goose.
She decides to go on
She must insure that the
grass field can feed her three animals during her absence.
- The cow eats as much
grass as the goat and the goose.
- The grass field can
feed the cow and goat for 45 days.
- The grass field
can feed the cow and goose for 60 days.
- The grass field can feed the goose and
goat for 90 days.
How many days can
she leave before her three animals run out of grass?