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Determine the ratio of the volumes of the two similar spheres.

Mathematics

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Answer

792 cm2\text{792 cm}^2

Step-by-step solution

4 steps
  1. Determine the ratio of the volumes of the two similar spheres.

    Let VSV_S be the volume of the smaller sphere and VLV_L be the volume of the larger sphere.
    VS=1408 cm3V_S = 1408 \text{ cm}^3
    VL=4752 cm3V_L = 4752 \text{ cm}^3
    The ratio of the volumes (smaller to larger) is:

    VSVL=14084752\frac{V_S}{V_L} = \frac{1408}{4752}

    Simplify the fraction by dividing both numerator and denominator by their greatest common divisor, which is 176:

    1408÷1764752÷176=827\frac{1408 \div 176}{4752 \div 176} = \frac{8}{27}

    So, the volume scale factor (VSF) from the smaller to the larger sphere is 827\frac{8}{27}.

  2. Determine the linear scale factor (LSF).

    The linear scale factor is the cube root of the volume scale factor:

    LSF=VSVL3=8273LSF = \sqrt[3]{\frac{V_S}{V_L}} = \sqrt[3]{\frac{8}{27}} LSF=83273=23LSF = \frac{\sqrt[3]{8}}{\sqrt[3]{27}} = \frac{2}{3}

    This means that the linear dimensions (like radii) of the smaller sphere are 23\frac{2}{3} times those of the larger sphere.

  3. Determine the area scale factor (ASF).

    The area scale factor is the square of the linear scale factor:

    ASF=(LSF)2=(23)2ASF = (LSF)^2 = \left(\frac{2}{3}\right)^2 ASF=2232=49ASF = \frac{2^2}{3^2} = \frac{4}{9}

    This means that the surface area of the smaller sphere is 49\frac{4}{9} times the surface area of the larger sphere.

  4. Calculate the surface area of the larger sphere.

    Let ASA_S be the surface area of the smaller sphere and ALA_L be the surface area of the larger sphere.
    We are given AS=352 cm2A_S = 352 \text{ cm}^2.
    Using the area scale factor:

    ASAL=ASF\frac{A_S}{A_L} = ASF 352AL=49\frac{352}{A_L} = \frac{4}{9}

    To find ALA_L, rearrange the equation:

    AL=352×94A_L = 352 \times \frac{9}{4} AL=352×94A_L = \frac{352 \times 9}{4} AL=88×9A_L = 88 \times 9 AL=792 cm2A_L = 792 \text{ cm}^2

    The surface area of the larger sphere is:

    792 cm2\text{792 cm}^2
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