tolong jawab nomer 15,16,17,18 pakek caranya ya pliss

15) kemeja=(21+1 1/2) x12 =22 1/2 x12=270. celana=(7+3/4)x20=7 3/4 x20=155. kaos =1+1/2x144=1 1/2x144=216 jawabanya yang B. 16) 22.00+2.400-4.400=20.000.jawabanya yang D. 17) 6.000:150=40liter/detik jawabanya yang A. 18)waktu=4.000:16.000. =0,25jam=15menit. 06.05+00.15=06.20. gua ada jawabanya ni gua poto jawabanya

15. 21 lusin × 12 = 252
7 kodi = 7 × 20 = 140
1 gross = 144
1 1/2 lusin = 3/2 × 12 = 18
3/4 kodi = 3/4 × 20 = 15
1/2 gross = 72

kemeja anak = 252 + 18 = 270
celana anak = 140 + 15 = 155
kaos anak = 144 + 72 = 216
jawabannya B

16. 2,2 ha = 22/10 × 10.000 = 22000
2.400 m^2
44 are = 4400
22000 + 2.400 - 4400 = D. 20.000

17. w = 2 1/2 mnt = 5/2 × 60 = 1500
v = 6 m^3 = 6 × 1000
= 6000
d = v/w = 6000/1500 = A. 40

18. 4000/16000 = 0,25 = 15 mnt
06. 05 + 15 = D. 06.25