gaann, tolongin saya nmr 3,4,5 gan.. sekalian pkai jalanyya y gan...

Untuk no. 2
Dik:
=> 20p = 5 kg terigu
=> 15d = 4 kg terigu
Dit:
a) 140p = x kg terigu
b) 45d = y kg terigu
Jwb:
a) 140p = x kg
=> 20p × 7 = 7x = 7 × 5kg = 35 kg terigu
b) 45d = y kg
=> 15d × 3 = 3y = 3 × 4kg = 12 kg terigu Nomor 4: Dik: v1 = 6km/jam. t1 = 5 jam Maka, s = v×t = 6km/jam ×5jam = 30km Untuk mencari v2: => s awal = 2 jam × 6km/jam = 12km => jarak yg tersisa = 30-12 = 18km => waktu yang tersisa = 5 jam - 2 jam - 30 menit = 2 jam 30 menit => v2 = 18km/2 1/2 jam = 7,2 km/jam Semoga membantu :)