Four cubes of side 2 cm each are joined end to end. The surface area of the resulting solid is
A
70 cm²
B
36 cm²
C
72 cm²
D
24 cm²
Correct Option:
C
Explanation
Four cubes of side 2 cm joined end-to-end form a cuboid of dimensions 8 cm × 2 cm × 2 cm. Its surface area is 2(lb + bh + hl) = 2(8×2 + 2×2 + 8×2) = 2(16 + 4 + 16) = 72 cm².
