Jawabanmu

2014-06-10T05:58:40+07:00
M = s'/s --> s' = M×s =4×12 =48cm ket: M =perbesaran, s' = jarak bayangan, s=jarak benda
2014-06-10T07:03:13+07:00
Dik: s`=12cm
m=4x
dit:s=....?
jwb=m=s`/s
4=12cm/s
s=12/4
s=3cm