May 2019 2 26 Report
Sebuah kayu berbentuk tabung berjari-jari r dan tingginya t. luas permukaan tabung tersebut dirumuskan..
a.L=πr (r+t)
b.L=2πr (r+t)
c.L=πr² (1+t)
d.L=2πr² (1+t)

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