Answer:
216 sq. cm.
Explanation:
If we fold the paper of the given dimensions then we will get a rectangular prism with dimension 10 cm by 6 cm by 3 cm.
Now, a rectangular prism has the total surface area given by
A = 2(LW + WH + HL)
where, L = length = 10 cm.
W = width = 6 cm. and
H = height = 3 cm.
Therefore, total surface area = A = 2(10 × 6 + 6 × 3 + 3 × 10) = 216 sq. cm. (Answer)