Jawabanmu

2014-05-19T10:25:32+07:00
Lp = 2(pl+pt+lt)
198 = 2(p.6+p.3+3.6)
198 = 2(6p+3p+18)
198 = 12p+6p+36
198-36 = 18p
162  = 18p
162/18 = p
9   = p


maaf kalau salah:)

2014-05-19T10:25:56+07:00
Lp =   (2 ×p × l) + (2 × l × t) + (2 × p × t)
198 = (2 × p × 6) + (2 × 6 × 3) + (2 × p × 3)
198 = 12p + 36 + 6p
198 = 18p + 36
198 - 36 = 18p
    9       = p