Sides of two cubes are in the ration of $2 : 3$ .
Find the ratio of their surface areas.

4 : 9

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7 : 9

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8 : 27

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None of these

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Solution

The correct option is A $4 : 9$
$a_{1} : a_{2} = 2 : 3$ then $A_{1} : A_{2} = a_{1}^{2} : a_{2}^{2}$
$= 4 : 9$

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Similar questions

Two cubes have their volumes in the ratio $1 : 27$ . The ratio of their surface areas is

(a) $1 : 3$

(b) $1 : 9$

(d) none of these

The volumes of two cubes are in the ratio $8 : 27$ . Find the ratio of their surface areas.

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