Tolong dijawab ya,No.36-39

36. 240 : 420 = 120 : 210 = 60 : 105 = 12 : 21 = 4 : 7

37.Jarak peta = 8 cm
Skala = 1 : 2000.000
Jarak sebenar nya
= 8 × 2000.000 : 100.000 = 160
Jarak sebenar nya = 160
Waktu = 4 jam
kecepatan = 160 ÷ 4 = 40

38. 8,25 + 5,2 = 13,45 + 3, 4 = 16,85 + 2,25 =
19,10

39.L.trapesium = (atas + bawah) × tinggi × 1/2
= (20+25) × 12 × 1/2
= 45 × 6 = 270
L.Segitiga = alas × tinggi × 1/2
= 20 × 20 × 1/2
= 400 × 1/2 = 200
270 + 200 = 470