There are 80 cookies in a box. Tom eats cookies at a rate of 5 per minute. At the same time, Andy also eats cookies at a different rate. How many cookies does Andy have to eat if he and Tom need to finish the cookies in 10 minutes?

Respuesta :

In 10 minutes, Tom eats (5 cookies/minute)×(10 minutes) = 50 cookies.

Andy must eat the remaining cookies:

... 80 cookies - 50 cookies = 30 cookies.

_____

The answer to the question asked is

Andy must eat 30 cookies.

The answer to the question not asked is

Andy eats those cookies at the rate

... (30 cookies)/(10 minutes) = 3 cookies/minute