Mrs. Ebert feeds her dog 1/3 of a cup of dog food twice each day. How long will 6 cups of dog food last?

Question

A 18 days
B 2 days
C 4 days
D 9 days

Answer 1

Each day, Mrs. Ebert feeds her dog 1/3 cup of dog food + 1/3 cup of dog food = 2/3 cup of dog food.
Each day, Mrs. Ebert uses 2/3 cup of dog food * 2 = 4/3 cup of dog food.
Over 6 cups of dog food / 4/3 cup dog food per day = <<6/(4/3)=4.5>>4.5 days.
This means the dog food will last for a little more than 4 days.
The answer is C) 4 days.