Question

Helen works at a local pet shop. She uses 5 kilograms of dog food to feed 3 dogs for 4 days. At the same feeding rate, how many kilograms of dog food will Helen need to feed 12 dogs for 1 week?

Steps please!

Answer 1

3 dogs for 4 days = 5 kg
12 dogs for 4 days = 20 kg

These rates are for 4 days of care.

4 days * 7/4 = 7 days, so scale up the amount of food for 12 dogs for 4 days. 20 kg * 7/4.

20 kg * 7/4 = 20(7)/4 = 140/4 = 70/2 = 35 kg for 12 dogs for 4 days

Answer 2

Alternate way of breaking down the problem:

3 dogs for 4 days = 5 kg
12 dogs for 4 days = 20 kg

12 dogs for 1 day = 5 kg
12 dogs for 7 days = 35 kg

Answer 3

In my first post,

"20 kg * 7/4 = 20(7)/4 = 140/4 = 70/2 = 35 kg for 12 dogs for 4 days"

SHOULD INSTEAD READ

"20 kg * 7/4 = 20(7)/4 = 140/4 = 70/2 = 35 kg for 12 dogs for 7 days"

Answer 4

Thank you! :)

Answer 5

Anytime