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rtraylor3

  • 3 years ago

The radius of one sphere is twice as great as the radius of another sphere. Find the ratio of their surface areas.

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  1. ParthKohli
    • 3 years ago
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    Why don't you take a radius of 1 and a radius of 2 and then compare their surface areas? :)

  2. ParthKohli
    • 3 years ago
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    \( \color{Black}{\Rightarrow Area(Sphere ) = 4\pi r^2 }\)

  3. rtraylor3
    • 3 years ago
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    I tried that. I got 1:4.

  4. ParthKohli
    • 3 years ago
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    \( \color{Black}{\Rightarrow \textbf{Radius of 1}: 4\pi r ^2 \Longrightarrow 4\pi }\) \( \color{Black}{\Rightarrow \textbf{Radius of 2}:4\pi r^2 \Longrightarrow 16\pi }\) 1:4 is correct~!

  5. rtraylor3
    • 3 years ago
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    Thanks!! :) :) :)

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