Jawabanmu

2014-06-02T14:06:35+07:00
1/f = 1/s + 1/s'
1/3 = 1/5 + 1/s'
s' = 7,5

M = s'/s = 7,5/5 = 1,5

M = h'/h
1,5 = h'/2
h' = 3 cm