diagonal ruang suatu kubus 30 cm. berapakah volumnya

DR = r.√3
30 = r√3
30/√3 = r
30(√3)/3 = r
30√3/3 = r
10√3 = r

V = S³
= (10√3)³
= 10³.(√3)³
= 1000.3√3
= 3000√3

Volume = s x s x s
= 30 x 30 x 30
= 27.000

Semoga Membantu ^_^