Answer:
Let “x” be the number, twice of the square of which is equal to the cube of 18.
That means, 2 × x^2 = 18^3.
That means, 2 × x^2 = 2 × 9 × 18^2.
That means, x^2 = 9 × 18^2 = 3^2 × 18^2.
That means, x^2 = (3 × 18)^2.
That means, x = 3 × 18 =
[tex]\large\color{green}\boxed{ = 54}[/tex]
