Question
Two cubes have volumes in the ratio 1 : 27 . Then the ratio of the area of the face of one of the cubes to that of the other is :
Answer: Option C
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Let their edges be a and b . Then
`a^3/b^3 = 1/27`
`hArr (a/b)^3 = (1/3)^3`
`hArr a/b = 1/3`
`hArr a^2/b^2 = 1/9` = 1 : 9
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