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eroshea

  • 3 years ago

The weight of a piece of crystal in the form of a regular dodecahedron is 360 lbs., and each of its edges is 10 inches long. What is the weight of a similar piece of crystal whose edge edge measures 16 in.?

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  1. hartnn
    • 3 years ago
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    for same density, weight is proportional to volume and volume is proportional to cube of side. hence, weight is proportional to cube of side W1/W2 = S1^3/S2^3 360/W2 = (10/16)^3 u get W2=1474.56

  2. eroshea
    • 3 years ago
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    thanks!

  3. hartnn
    • 3 years ago
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    welcome ^_^

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