Question

the volume of a cube is
$72 9 {}cm^3$
find its total surface area

Answer 1

volume of cube = side³

=> 729 cm³ = side³
=> ³√729 cm³ = side

=> 9 cm = side

TSA of cube = 6×side²

=> TSA = 6×(9)²
=> TSA = 6×81 = 486 cm²

hope this helps

Answer 2

volume of cube = (side length )³
729 cm³ = (side length )³
(9cm)³ = (side length )³
side length = 9cm

now, total surface area of cube = 6 × (side length)² = 6 × (9cm)² = 6 × 81 cm²
= 486 cm²