Dibantu dong Guys... Nomor 5 sampai 7 Pake cara.... Yg jawab Gw kasih Brainliest dah

5.
Lp kubus = 6 x sisi
S = 7 x 7
S = 49

Lp = 6 x 49
Lp = 294 (B)

6.
Lp balok = 2(p.l + p.t + l.t)
Lp = 2(12 . 9 + 12 . t + 9 . t)
Lp = 2(108 + 12t + 9t)
Lp = 2(108 + 21t)
Lp = 216 + 42t
426 = 216 + 42t
426 - 216 = 42t
210 = 42t
t = 210/42
t = 5 cm (B)

7.
V. bocor = V. awal - V. akhir
(100 . 60 . 50) - (100 . 60 . 35)
300.000 - 210.000
90.000 (C)

semoga membantu!