Jawabanmu

2014-05-04T14:54:37+07:00
2Πrt+Πr^2+Πr^2
(2×3,14×10,5×12) + (3,14×10.5^2) + (22/7×14×14 - 3,14×10,5×10,5)

791,28 + 346,185 + (616-346,185)

791,28 + 346,185 + 269,815

= 1407.28