SSC CGL 2022 PYQ — Question 63

SSC CGL - 02 Dec 2022 - Shift 3 • Quantitative Aptitude • Q63

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. 183m{18\sqrt3} m

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