Jawabanmu

2014-06-05T13:28:07+07:00
V = plt
315 = 9.7.t
315 = 63t
t = 315 / 63
t = 5 cm

Lp = 2pt + 2lt + 2pl
Lp = 2.9.5 + 2.7.5 + 2.9.7
Lp= 90 + 70 +126
Lp = 286 cm²
2014-06-05T13:36:06+07:00
315 cm³ ÷ 9 cm ÷ 7cm = 5 cm (tingginya)
Lbalok = (9 cm × 7 cm) + (9 cm × 5 cm) + (7 cm × 5cm) = 286 cm²
MAAF KALAU SAYA SALAH