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 options: A) 3 dm B) 4 dm C) 5 dm D) 6 dm E) 7 dm
33 + 43 + 53 = a3 =&gt; a = 6   ANSWER:6 dm
<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?