Jawabanmu

2014-04-07T19:37:03+07:00
L^2 = s^2 - (R-r)^2 l^2 = 17^2 - (10-2)^2 l^2 = 289 - 64 l^2 = 225 l = 15
2014-04-07T21:06:02+07:00
17pangkat2+(10-2)pangkat 2 289-64 √225 =15