Jawabanmu

2014-09-07T21:31:55+07:00
W1 = 1/3W2
W1 + W2 = 100 kg 
m = w/g
m = 980/9,8 = 100
W1 = Ari
W2 = Ayah
jawab :

W1 + 3W1 = 100 kg
4W1 = 100 
W1 = 25 kg ( Ari)
W2 = 75 kg (ayah)