Free help with homework

Why join Brainly?

  • ask questions about your assignment
  • get answers with explanations
  • find similar questions

3 cubes whose measures are 3 cm,4 cm,5 cm are joined to form a single cube . find its edge and surface area

Are they melted and made into a single one?


The sum of the volume of the smaller cubes= volume of the larger cube
Let the side of the larger cube be'a'.
 3^{3} + 4^{3} + 5^{3} = a^{3}
27+64+125= a^{3}
a= \sqrt[3]{216}
therefore side of the larger cube is 6cm
the surface area of the larger cube is 6 a^{2} =6( 6^{2} )
=216 cm^{2}
0 0 0
The Brain
  • The Brain
  • Helper
Not sure about the answer?
Learn more with Brainly!
Having trouble with your homework?
Get free help!
  • 80% of questions are answered in under 10 minutes
  • Answers come with explanations, so that you can learn
  • Answer quality is ensured by our experts