tolong jawab nomor 1-4

1. luas 1 sisi kubus = 2.646 cm² : 6 = 441
rusuk kubus = √441= 21
volume = rusuk³ = 21³ = 9.261 cm³

2. luas permukaan = 2(PL+PT+LT)
674 = 2(Px10 + Px9 + 10x9)
647 = 2(10p + 9p + 90)
647 = 20p + 18p + 180
647 = 38p + 180
647 - 180 = 38p
494 = 38p
P = 494 dibagi 38 = 13 cm

volumenya = 10 x 9 x 13 = 1.170 cm³