Jawabanmu

2014-04-12T13:01:16+07:00
K = 2(p+l)
150 = 2(6x + 9x)
150 =2(15x)
150 = 30x
x = 150/30
x = 5

panjang = 9x = 9 x 5 = 45 cm
lebar  = 6x = 6 x 5 = 30 cm

Luas = p x l
         = 45 cm x 30 cm
         = 1350 cm²
2014-04-12T13:52:07+07:00
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