October 2018 1 19 Report
Sebuah cermin cekung memiliki perbesaran bayangan 2 kali. bila bayangan nyata 180 cm dari cermin cekung & jarak api 60 cm. maka jarak benda terhadap cermin cekung adalah..
a.90 cm
b. 120 cm
c. 360 cm
d. 540 cm

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