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John bought a 20 pound bag of dog food. He feeds his dog twice a day. If John gives his dog 3/4 pound of dog food each feeding, how many days will it last?

Sagot :

Total weight of the bag of dog food bought by John = 20 Pounds

Number of times the dog is fed in a day = 2

Weight consumed by the dog at each feeding = 3/4 Pound.

Therefore:

[tex]\begin{gathered} \text{Weight of food used per day = 2 }\times\frac{3}{4}\text{ } \\ =\frac{6}{4} \\ =\frac{3}{2}\text{ Pounds} \end{gathered}[/tex]

To determine how many days the 20-pound bag will last, we have:

[tex]\begin{gathered} \frac{20\text{ Pounds}}{\frac{3}{2}\text{ Pounds per day}} \\ =20\times\frac{2}{3} \\ =\frac{40}{3} \\ =13\frac{1}{3}\text{ days} \end{gathered}[/tex]

The 20-pound bag of dog food will last 13 1/3 days.