A cuboid of length 36 m, breadth 18 m and height 9 m is melted and recast into a cube. Find the length of the diagonal of the cube.
Show answer & explanation
Correct answer: A
Explanation
The correct answer is Option 1 i.e.
Given:
Length = 36 m, breadth = 18 m and Height = 9 m
Formula used:
Volume of cuboid = lbh ---- (1)
Volume of cube = a3 ----- (2)
Diagonal of cube = √3a ---- (3)
Where l = length, b = breadth, h = height and a = side of cube
Calculations:
Equating equation (1) = equation (2), we get
⇒ 36 × 18 × 9 = a3
⇒ a = 18 m
Using equation (3)
Diagonal of cube = √3 × 18
⇒ 18√3 m