Jawabanmu

2013-12-20T15:26:36+07:00
40820....
pythagoras:
=100+576
= 676
=diakarin jadi 26

pake rmus luas dlimut krucut
phi.r.s
3,14.10.26
816,4

luas karton yg di prlukan= 50 x 816,4
=40820
2013-12-20T15:31:34+07:00
 \pi r(r+s)
s = r r^{2} +  t^{2}
   = 10 10^{2} +  24^{2}
   = 100 + 576 = 676 \sqrt{676} = 26

 \pi r(r+s)
3,14 x 10 (10 +26)
3,14 x 10 ( 36)
=1130,4 cm

jika 50 topi = 50 x 1130,4 = 56520  cm^{2}