Jawabanmu

2013-12-23T21:02:25+07:00
p = 2x+3
l = x+6, 
t = x+ 2

panjang rusuk = 4(p+l+t)
= 4 (2x+3+x+6+x+ 2)
= 8x+12+4x+24+4x+8
= (16x+34) cm

luas sisi = 2(pl+pt+lt)
= 2 ((2x+3)(x+6) + (2x+3)(x+ 2) + (x+6)(x+ 2))
=
 2((2x2+15x+18) + (2x2+7x+6) + (x2+8x+12)) 
=2(5x2 + 29x+ 36)
= (10x2+58x+78) cm2

Volume = plt
= (2x+3)(x+6)(x+ 2)
=(2x2+15x+18)(x+2)
=2x3+19x2+48x+36 cm3
2013-12-23T22:52:22+07:00