Two cubes of volumes 8cm3 and 27cm3 are glued together at their faces to form a solid with the smallest possible surface area. What is the number of square centimeters in the surface area of the resulting solid

70

Step-by-step explanation:

First, we note that the cubes of volume 8 and 27 must have edges of length 2 and 3, respectively.

If not joined, total area is 78

The maximum concealed surface area is an entire face of the 2-cube, on both solids: 2*4 = 8

So, the minimum exposed area would be 78-8 = 70

D

Step-by-step explanation:

Hope this helps!