Jawabanmu

2014-02-16T21:34:24+07:00
jika beban:150 gr
      lengan beban:25 cm
      lengan kuasa:75 cm

jawaban : (150.25)/75 = 50
2014-02-16T21:35:34+07:00
Lb . b = lk. k
25 cm . 150 gr = 75 cm . k
 \frac{25 cm . 150 gr}{75 cm} = k
50 cm             = k