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p+l=48
3l=48
l=16
maka pnjang=32
jadi luas=512
dan panjang persegi panjang adalah = x.2
sehingga :
k = 2(p+l)
96 = 2 (x+x.2)
96 = 2 (2x.2)
96 = 4x.4
96+4 = 4x.4+4
100 = 4x
100:4 = 4x:4
25 = x
luas = pxl
luas = x (x.2)
luas = 25 x 50 = 1250
mohon di cek lagi dan semoga bermanfaat :)