Jawabanmu

2014-03-13T18:17:52+07:00
Lp = 6 x s2
30 = 6 x s2
30 / 6 = s2
5 = s2
s = 2,23 cm

Lp = 6 x s2
60 = 6 x s2
60 / 6 = s2
10 = s2
s = 3,16 cm

V = s (pangkat 3)
27 = s3
s = 3 cm
2014-03-13T18:20:50+07:00
Luas Permukaan Kubus = 6 x s x s
a.
30 = 6 x s x s
5 = s²
s = √5

b.
60 = 6 x s x s
10 = s²
s = √10

c.
volume kubus = s x s x s
27 = s³
s = ³√27
s = 3