The edge of three cubes of metal is 3 dm, 4 dm and 5 dm. They are melted and formed into a single cube. Find the edge of the new cube?	Options: A) 7 B) 5 C) 8 D) 6 E) 4
Explanation:   33 + 43 + 53 = a3 =&gt; a = 6   Answer: Option 6
<result>D</result>
The edge of three cubes of metal is 3 dm, 4 dm and 5 dm. They are melted and formed into a single cube. Find the edge of the new cube?