Jawabanmu

2014-09-10T11:24:23+07:00
Llblavhfgakuzgsjozwfzkxkhbsifgbdjxhhisiyd
2014-09-10T12:44:10+07:00
V = 22/7 r^2 t
2156 = 22/7 r^2 14
2156/14 = 22/7 r^2
154 = 22/7 r^2
154 x 7/22 = r^2
49 = r^2
r = 7

L selimut = 2 x 22/7 x r x t
= 2 x 22/7 x 7 x 14
= 154