tolong dijawab pakai caranya ya kk

1) 18 = 2 × 3²
24 = 2³ × 3
42 = 2 × 3 × 7
FPB = 2 × 3 = 6
jadi byk kantong = 6

2) r = 1,5 m = 15 dm
V = r³ = 15 × 15 × 15
= 3.375 dm³
= 3.375 liter
d = 5 liter/dtk
a) waktu = vol ÷ debit
= 3.375 liter ÷ 5 liter/dtk
= 675 detik
= 11 ¾ menit
b) pukul 16.30 + 00.11.45
= 16.41.45

3) V = π × r² × t
770 = 22/7 × r² × 5
770 × 7 = 22 × 5 × r²
5.390 = 110 × r²
r² = 5390 ÷ 110
r = √49
r = 7 cm