Question 13
Identical small cubes form the pattern shown. Lily wants to paint group 4 green. Each small cube has side length 1 cm. Find the area of the painted part.
Source interpretation: paint every exterior face of the assembled group, including its underside; faces where two cubes touch are not painted.
Source interpretation: paint every exterior face of the assembled group, including its underside; faces where two cubes touch are not painted.