Jawabanmu

2014-05-31T19:27:42+07:00
Dik : h = 10 cm, s = 12 cm, f = 18 cm
dit : h' = ?

jwb : 1/s' = 1/f - 1/s
        1/s' = 1/18 - 1/12 
        1/s' = 2/36 - 3/36
        1/s' = -1/36
           s' = 36/1 = 36 cm
           h' = s'/s x h = 36/12 x 10 = 30 cm
     
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