What is the volume of a cube whose surface area is 54 cm2?

We know that,

Surface area of cube = 6a² 

Volume of cube = a³ 

We have,

Surface area of cube = 54 cm² 

Now,

Surface Area =

= 54 = 6a2 

= a² = 546

= a² = 9

= a = 3 cm

Now volume of cube = (3)³ = 27 cm³