Jawabanmu

2014-03-14T22:28:13+07:00
Wu (W di udara) = 15 N
Wf (W didalam fluida) = 12 N

Volume?

Wf = Wu - Fa
12 = 15 - Fa
Fa = 3

Fa = ro x g x v
 3  = 1 x 10 x v
V =
     10
V = 0,3