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Q.

 

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

 

 

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a

2 2 :1

 

b

8:1

 

c

1:2

 

d

2:1

 

answer is C.

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Detailed Solution

 

V 1 V 2 = 8 1

⇒ a 1 3 a 2 3 = 8 1

⇒ a 1 a 2 3 = 8 1 ⇒ a 1 a 2 = 8 1 2

a 1 a 2 = 2 1

∴ a 1 : a 2 =2:1

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