Tolong dikumpulin besok…
No 12. Pakai cara,jawaban sesuai ABCD yg disitu
Jawaban:
Lp kubus = 6 × s²
Lp kubus = 6 × 10² = 600cm²
Lp balok = 2( pl + pt +lt)
Lp balok = 2(30.10 + 30.10 + 10.10)
Lp balok = 2(300 +300 + 100)= 1400cm²
Lp kubus + Lp balok
=600 +1400=2000cm²