Six cubes, each with an of edge 4.5 cm are joined end to end. Find the total surface area of the resulting cuboid.
Show answer & explanation
Correct answer: D
Explanation
When 6 cubes are joined in a row, the dimensions of the resulting cuboid will be:
Length = 6 × 4.5 = 27 cm
Width = 4.5 cm
Height = 4.5 cm
Total surface area = 2(lb + bh + lh)
= 2(27 × 4.5 + 4.5 × 4.5 + 27 × 4.5)
= 2(121.5 + 20.25 + 121.5)
= 526.5 cm²