Jawabanmu

2014-06-10T21:14:10+07:00
A. 1/f -1/s=1/10 - 1/20= 2/20-1/20=1/20
bayangan 20/1= 20 cm

B. M=s'/s=20/20=1kali

C. M=h'/h -> h'=M × h = 1×20 = 20cm