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Keliling : 50
panjang : lebar + 5
Tanya : Luas => panjang x lebar
Jawab :
cari dulu lebar nya
keliling = 2p + 2l
50 = 2 (p+l) --> subsitusi Panjang
50 = 2 ( l + 5 + l )
50 = 2 ( 2l + 5)
50 = 4L + 10
50-10 = 4L
40 = 4L
L= 40/4
L= 10
Lebar = 10m
Panjang = Lebar + 5
berarti panjang = 10 + 5 = 15 m
Luas = Panjang x Lebar
= 15 x 10
=150 m^2
cuma bisa pake pindah ruas aku, maaf ya ._.