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17. A tub can drain 24 gallons of water in 5 minutes. What is this rate in cups per second? Use conversion factors to determine the answer. Show your work.

Sagot :

The tub is said to drain 24 gallons of water in 5 minutes.

The rate at which water is drained is;

[tex]\text{Rate r}=\frac{volume}{time}[/tex]

The volume is given as 24 gallons.

Recall that 1 US gallon is equivalent to 16 US cups.

[tex]\begin{gathered} \text{Volume = 24 gallons }\times16\text{ cups/gallon} \\ \text{Volume}=384\text{ cups} \end{gathered}[/tex]

Time taken is given as 5 minutes.

since the rate is in cups per second, we need the convert the time to seconds;

[tex]\begin{gathered} \text{Time}=5\text{ minutes}\times60\text{ seconds/minute} \\ \text{Time}=300\text{ seconds} \end{gathered}[/tex]

Using the rate formula, The rate in cups per second is;

[tex]\text{Rate r}=\frac{384}{300}=1.28\text{ cups/second}[/tex]

The rate in cups per second is 1.28 cups per second