A cuboid with sides 4, 6 and 8 units is covered with paper. The paper is removed, and a square is made from it. What is the side (in units) of the square?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 14.42.
Total surface area of cuboid = 2(lb + bh + hl)
Area of square = a2
a2 = 2(4 × 6 + 6 × 8 + 8 × 4)
⇒ a2 = 2(24 + 48 + 32)
⇒ a2 = 208
⇒ a = 14.42