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A stack of one dozen cookies of diameter 5 in. exactly fits in a cylindrical container of volume 176.715. Which is the thickness of each cookie?

User Spir
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1 Answer

6 votes
Answer:

The thickness of each cookie = 0.75 in

Step-by-step explanation:

Given:

A dozen cookie each with 5 in diameter

Volume of the cylindrical container = 176.715 inĀ³

To find:

the thickness (height) of each cookie

To determine the thickness of each of the cookie, we will apply the volume of cylinder:


Volume\text{ of a cylinder = \pi r}^2h

Since there are 12 cookies (a dozen), the volume of the cylinder will be the sum of the volume of each of the 12 cookies


\begin{gathered} Volume\text{ of the cylindrical container = 12}*\text{\lparen\pi r}^2h) \\ let\text{ \pi= 3.14} \\ diamete\text{r = 2\lparen radius\rparen} \\ radius\text{ = diameter/2 = 5/2} \\ radius\text{ = 2.5 in} \\ \\ 176.715\text{ = 12}*\text{3.14 }*\text{ 2.5}^2\text{ }*\text{ h} \end{gathered}
\begin{gathered} 176.715\text{ = 235.5h} \\ h\text{ = }(176.715)/(235.5) \\ h\text{ = 0.75 in} \end{gathered}

The thickness of each cookie = 0.75 in

User GhostJago
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