Jawabanmu

2014-04-13T20:02:11+07:00
K= 2 \pi r.n
   = 2 x 22/7 x r x n
   = 2 x 22/7 x 70 x 40
   = 2 x 22 x 10 x 40 =1760 cm = 1,76 m
ralat 17,6 m
ralat 176 m karena 2 x 22 x 10 x 40 = 17600 cm = 176 m
iya enggak papa terima kasih atas bantuannya
ok
Jawaban paling cerdas!
2014-04-13T20:03:05+07:00
= 2 x 22/7 x r x n
= 2 x 22/7 x 70 x 40
= 2 x 22 x 10 x 40
=1760 cm
= 176 m