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64:2= 32
kemungkinan= 20+12
20=5x4 12=3x4
lebar= 12
jawabannya A
maaf itu aku pakenya rumus mengira2 :D
5 : 3 Semuanya dikali 4
20 : 12
Keliling = 2 x ( p + l )
2 x ( 20 + 12 )
2 x 32
64
Panjang : 20
Lebar : 12