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$If the volumes of two cubes are in the ratio 8 : 1, then the ratio of their edges is$

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$8 : 1$

$22 : 1$

$2 : 1$

$1 : 2$

answer is C.

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Detailed Solution

$V 1 V 2 = 81$

$⇒ a 13 a 23 = 81$

$⇒ a 1 a 2 3 = 81 ⇒ a 1 a 2 = 812$

$a 1 a 2 = 21$

$∴ a 1 : a 2 = 2 : 1$

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