Barney & Clyde by Gene Weingarten, Dan Weingarten & David Clark for November 12, 2013


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  1. Missing large
    yousir  over 7 years ago

    Googol it.

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  2. Black knight
    black_knight15_au  over 7 years ago

    Hint both the volume and surface area of the top are ….

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  3. Butterfly
    QuietStorm27  over 7 years ago

    Me too.

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  4. Riffdancinlogo
    Riff Gibson Premium Member over 7 years ago


    Solution for all our non-math-geek “Barney & Clyde” friends:

    Since the end (base) of a cylinder [=the cake] is a circle, the area of that circle [=top of the cake] is given by “pi” multiplied by the radius squared [= “pi” x “r” x “r”].

    Multiplying by the height of the cake we get the volume of the cylinder, er, cake: “height” multiplied by “pi” multiplied by “radius squared” [= “h” x “pi” x “r” x “r”]

    So, if both the radius and the height are one unit, then the above multiplication yields both the area and the volume equal to pi:

    Area of the top of the cake = “pi” x “r” x “r” = “pi” x 1 × 1 = “pi”

    Volume of the cake = “h” x “pi” x “r” x “r” = 1 x “pi” x 1 × 1 = “pi”

    Therefore, in this case, the cake is also pi!

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