October 2018 1 105 Report
Di labolatorium Kimia, diketahui sebuah tabung reaksi memiliki perbandingan ukuran yaitu r:t = 3;5 ,jika luas selimut tabung reaksi tanpa tutup adalah 156π cm², maka jari-jari tabung adalah ...

a.6
b.8
c.10
d.12
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