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R = 16 cm
s = ... cm
f = R/2 = 16/2 = 8 cm
1/f = 1/s + 1/s'
1/s = 1/f -1/s'
1/s = 1/8 -1/10
1/s = (10 - 8)/80
1/s = 2/80
s = 80/2
s =40 cm
jadi jarak benda tersebut adlah 40 cm
semoga membantu :)
- cermin cekung
R = 16 cm --> f = 8 cm
s = 10 cm
s' = __ ?
s' = s (f / (s-f))
s' = 10 (8 / (10-8))
s' = 10 × 4
s' = 40 cm ← jwb