diketahui panjang tanah pak pawira (3x-5)dan lebr (2x+1)

a) keliling=2(P+l)
192. =2(3x-5+2x+1)
=2(5x-4)
192. =10x-8
192+8 = 10x
200. =10x
200/10=x
20=x
b)panjang=3x-5
=3.20-5
=60-5=55
lebar=2x+1
=2.20 +1
=40+1=41
c)luas=panjang×lebar
=55×41=2255m