+0  
 
0
89
1
avatar

A solid rectangular prism has dimensions 5 by 7 by 8.  A 3 by 3 by 3 cube is cut out of the corner creating a new solid What is the surface area of the new solid?

 Jun 17, 2020
 #1
avatar+781 
+1

It's actually the same when you cut out the corners because there are now 3 faces in place of the corner cut, and before there were 3 faces facing outwards on each corner. So the surface area is 2(5*7)+2(5*8)+2(7*8)=2*35+2*40+2*56=70+80+112=262. 

Correct me if I'm wrong.

 Jun 17, 2020

18 Online Users

avatar
avatar