October 2018 2 69 Report
Di laboratorium ipa, diketahui sebuah tabung reaksi memiliki perbandingan ukuran yaitu r : t = 3 : 5. jika luas selimut tabung reaksi tanpa tutup adalah 156 \pi cm², maka jari jari tabung adalah
A. 6 B.8 C.10 D.12
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