Answer:
14 square inches
Step-by-step explanation:
Since, three one inch cubes are stacked.
Therefore,
l = 1 in
w = 1 in
h = 3 in
Surface area of the composite figure
= 2(lw + wh + lh)
= 2( 1*1 + 1*3 + 1*3)
= 2 (1 + 3 + 3)
= 2 * 7
= 14 square inches
