no 8 sampai 10.tolong.pakai cara

8. 5 l / menit = 5 x 60 = 300 l / jam
waktu: V : D = 600 l : 300 l = 2 jan

9. L1= p x l = 18 x 12 = 216 cm2
L2= a x t : 2 = a = 27 - 18 = 9 cm
9 cm x 12 cm = 108 cm : 2 = 54 cm2
L1 + L2 = 216 + 54 = 270 cm2

10.L1=s x s = 28 x 28 =784 cm2
L2= a x t : 2 = 28 x 24= 672 : 2 =336 cm2
L1 + L2= 784 + 336 = 1120 cm2

MAAF KALAU SALAH