Jawabanmu

2014-04-29T21:23:20+07:00
Si = jarak bayangan
So = jarak benda

1/F = 1/si + 1/so
     = 1/10 + 1/5
     = 3/10
F   = 10/3 = 3,3
2014-04-29T21:23:57+07:00
1/f = 1/so + 1/si
1/f = 1/5 + 1/10
1/f = 3/10
f = 10/3
f = 3,3