tolong ya kawan ^,^ pake caranya

luas jajar genjang
= a x t
=12 x 10
=120
luas segitiga
=1/2 x a x t
=1/2 x 6 x 10
=3 x 10
=30
luas total
=120+30=150
biaya =150 x 200000
= Rp.30000000