Question

The cafeteria sells 40 drinks every 20 minutes. How many drinks does the cafeteria sell in 10 pointsan hour?A.)1200 drinksB.)140 drinksC.)120 drinks

Answer 1

To obtain the number of drinls that the cafeteria sells in an hour, the following steps are recommended:

Step 1: Express the rate at which the cafeteria sells drinks, as follows:

`\frac{40drin\text{ks}}{20\text{minutes}}`

Step 2: Multiply the rate above by the appropriate conversion factor which will help express it in a per-hour basis, as below:

`\frac{40drin\text{ks}}{20\text{minutes}}*(\frac{60min\text{ute}}{1\text{hour}})`

Step 3: Simplify to obtain the final expression, as follows:

`\begin{gathered} \frac{40drin\text{ks}}{20\text{minutes}}*(\frac{60min\text{ute}}{1\text{hour}}) \\ \Rightarrow\frac{2400\text{drinks}}{20\text{hour}} \\ \Rightarrow\frac{120drin\text{ks}}{1\text{hour}} \end{gathered}`

Therefore, the cafeteria sells 120 drinks in an hour