coba dibantu nomor 2 dan 6

kel = 2 x ( p + l )
72 = 2 x ( p + l )
72 : 2 = ( p + l )
36 = p + l

p : l = 3 : 1

p = 3/4 x 36 = 27
l = 1/4 x 36 = 9

luas = 27 x 9
= 243.... ( No 2)


6. pajak pertahun
= 15/100 x 800.000
= 120.000

900.000 - 800.000
= 100.000

100.000/120.000 x 12 Bulan
= 10 Bulan.