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panjang Al yang dibutuhkan
=2p+2l+2t
=2.180+2.120+2.150
=360+240+300
=900cm
=90m
biaya
=90m.70000/m²
=Rp6.300.000,00 (c)
31.
panjang kolam
p²=24²+(9-2)²
p²=24²+7²
p²=576+49
p=√625
p=25m
L keramik bawah
=p.l
=25m.20m
=500m²
L samping=
2.20
=40m²
Lsampng2=
9.20
=180m²
L sisi2=
2.24.2 +24.9.2
=96m²+432m²
=528m²
Lseluruh=
500+40+180+528
=1248m²