Jawabanmu

2014-05-11T17:02:37+07:00
Diket : ho = 5 cm
         so = 25 cm
         r = 40 cm
dit : hi ..?
jawab : 2/r = 1/so + 1/si
2/40 = 1/25 + 1/si
1/si = 1/25 - 2/40
1/si = 8-5
         200
1/si = 3/200
si/1 = 200/3
si = 66,7
m= |si|
     |so|
m= 66,7/25
m= 2,7
1/hi = ...?
m = 1/hi/1/ho
2,7= 1/hi/1/5
hi = 2,7.5
hi = 13,3 cm