A multi-layer cake is in the shape of a right cylinder. The height of the cake is centimeters , and its radius is . If each of the cake layers has a volume of approximately cubic centimeters, then how many layers does the cake have?
Question
A multi-layer cake is in the shape of a right cylinder. The height of the cake is centimeters , and its radius is . If each of the cake layers has a volume of approximately cubic centimeters, then how many layers does the cake have?
Solution
To find the number of layers in the cake, we need to use the formula for the volume of a cylinder. The formula is V = πr^2h, where V is the volume, r is the radius, and h is the height.
Given that the height of the cake is centimeters and the radius is , we can substitute these values into the formula.
V = π( )^2( )
Since each cake layer has a volume of approximately cubic centimeters, we can set up an equation:
V = cubic centimeters
π( )^2( ) = cubic centimeters
Now we can solve for the number of layers. We can rearrange the equation to solve for :
( )^2( ) = / π
Taking the square root of both sides:
( )^2 = / π
Simplifying:
( )^2 =
Taking the square root again:
= √( )
Calculating the square root:
=
Therefore, the cake has approximately layers.
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