Three cubes of side 6 cm each are joined end to end. The surface area of the resulting solid is
A
200 cm²
B
504 cm²
C
320 cm²
D
None of these
Correct Option:
B
Explanation
Three cubes of side 6 cm joined end to end form a cuboid of dimensions 18 × 6 × 6 cm. Its surface area is 2(lb + bh + hl) = 2(18 × 6 + 6 × 6 + 18 × 6) = 2(108 + 36 + 108) = 504 cm².
