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240= 5p. 3p
240=15p
240/15=p
16=p
K= p+l
= 5(p)+3(p)
= 5.16+3.16
= 80+48
= 128 cm
5p (3p)=240
15p^2=240
p^2=16
p= 4cm
panjang= 5p=5(4)=20cm
lebar= 3p= 3(4)=12cm
kliling= 2(p+ l)
= 2(20+12)
=2(32)
=64cm