Jawabanmu

2014-06-10T19:39:50+07:00
M= s'/s

1/f=1/s+1/s'
1/12=1/30+1/s'
1/s'= 3/60
s'= 20 cm

jadi perbesarannya = 20/30
= 2/3 kali
  • Pengguna Brainly
2014-06-10T19:55:34+07:00
M=s'/s
i/f=i/s+i/s'
jadi pembesaranya 20 30