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?
Choose the correct choice from the following answers: A) 15 B) 7 C) 9 D) 6 E) 3
33 + 43 + 53 = a3 =&gt; a   = 6   Answer: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?