A cubical block of metal weighs 4 pounds. How much will another cube of the same metal weigh if its sides are twice as long?	Answers:
A) 48
B) 32
C) 24
D) 18
E) 12
For example our cube have a side 1 meter, so we have 1 cubical meter in this cube   and this cubical meter weigth 4 pounds   If we take cube with side 2 meters we will have 8 cubical meters in this cube   8 meters * 4 pounds = 32 pounds   So answer is 32   And similar but more theoretical approach:   if we have sides a and b than they have equal ration with their areas:   a/b = a^2/b^2   and they have equal ration with their volumes:   a/b = a^3/b^3   we have two sides 1/2 so their volume will be in ratio 1/8   weight of one cube * volume of another cube     4 * 8= 
<gadget id="calculator">  4 * 8</gadget>
<output>32</output>
32   So answer is 32
<result>B</result>
A cubical block of metal weighs 4 pounds. How much will another cube of the same metal weigh if its sides are twice as long?