Doubling the Sides of the Cube For the following question


  
    A cubical block of metal weighs 6 pounds.How much will another cube of the same metal weigh if its sides are twice as long ? Ans=48
  


Here is how I am solving it but I am getting 12 as the answer

For the current cubical block $12$ edges of cube weigh = 6 pounds

$1$ edge weighs = $\frac{6}{12} =  \frac{1}{2} pound$ 

Doubled edge would weigh $2 \times \frac {1}{2} = 1$ so 12 edges would weigh $12 \times 1 = 12$
HINT: 


Write down the volume of a cube with edge length $x$. Think of an aquarium with all sides equal.
As 1. with length $2x$.
What's the ratio of the volumes?
How heavy is the larger cube?
8 edges of a cube. You have to do 6x8 in order to find your answer because you're doubling the lengths of each side. The logical answer may seem like 12, but the answer is actually 48