Jawabanmu

2014-04-08T21:08:01+07:00
Lp = 2πr (r+t)
2992 = 2. 22/7 . 14 (14+t)
2992 = 88(14+t)
2992 = 1232 + 88t
2992-1232 = 88t
1760 = 88t
t = 1760/88
t = 20 cm


Jawaban paling cerdas!
2014-04-08T21:10:33+07:00
Luas permukaan = 2πr (r+t)
2992 = 2 x 22/7 x 14 (14+t)
2992 = 88(14+ t)
2992 = 1232 + 88 t
2992 - 1232 = 88 t
1760 = 88t
= \frac{1760}{88}
= 20 cm

Jadi Jawabannya B => 20 cm
2 5 2