Jawabanmu

2014-03-24T17:52:47+07:00

Sisi kubus = s

diagonal ruang = s√3

2,5 = s√3

s = 2,5/√3 = (2,5/3)√3 = (5/6)√3

Volume kubus = s^3

= {(5/6)√3]^3

= (125/216)3√3

= (375/216)√3

= (125/72)√3