tolong dijawab pakai cara donk

1. skala 1:400➡4 m
panjang=3×4=12
lebar=6×4=24
luas=p×l
=12×24=288
keliling=2×(p+l)
=2×(12+24)
=73m

2.skala=1:200➡2m
panjang=2 1/2×2=5
lebar8×2=16
luas= p×l
=5×16=80
keliling2(p+l)=
=2(5+16)
=42m

3.skala=1:2000➡20m
panjang=6×20=120
lebar=4×20=80
luas =p×l
=120×80=9600
keliling=2(p×l)
=2(120+80)
=400m