(1) a square has an area of 240cm squared. what is the length of each side? leave in simplest radical form.

(2) a cube has a volume 2160cm cubed. what is the length of each side? leave in simplest radical form.

(1) A of square =  ²

    if   Area = 240 cm²
then  ² = 240 cm²

⇒ √(²) = √(240 cm²)

⇒    = √(16 × 15)
         
         =  4√15

(2) V of square =  ³

    if   Volume = 2160 cm³
then  ³ = 2160 cm³

⇒ √(³) = ∛(2160 cm³)

⇒    = ∛(216 × 10)
       
        = 6 ∛10

The answer to this question is c