Three cubes, each of side 1 cm, are joined end to end. The surface area of the resulting solid is
A
7 cm²
B
14 cm²
C
3 cm²
D
8 cm²
Correct Option:
B
Explanation
Joining three unit cubes end to end forms a cuboid of dimensions 3 cm × 1 cm × 1 cm. Its surface area is 2(lb + bh + hl) = 2(3 + 1 + 3) = 14 cm². The joined faces become internal and are not counted.
