Jawabanmu

2014-05-29T08:41:08+07:00
2(5x-3+x+4)= 62 cm
12 x + 2 = 62
12 x = 60
x= 5
panjang = 22 cm
lebar = 9 cm
luas = 22x9 cm = 198 cm2
2014-05-29T10:02:00+07:00
Keliling = 2p + 2L
62 = 2(5x-3) + 2(x+4)
62= 10x-6+2x+8
62=12x +2
60=12x
x=5

Luas= p x l
= (5(5)-3) x ((5)+4)
=22 x 9
=198cm^2