Question

Keliling alas sebuah Kerucut=88cm dan tinggi=24cm . Berapakah Volume kerucut tersebut ? π=22/7

Answer 1

L alas = 2Πr
88 = 2. 22/7 . r
88 = 44/7 . r
r = 88 . 7/44
r = 14

V kerucut = 1/3 Πr²
V = 1/3 . 22/7 . 14 . 14
V = 1/3 . 616
V = 35,3 cm³

Answer 2

88 cm = 22/7 . 2.r
2r = 88 x 7/22
2r = 28
r = 14
v = 1/3 . pi. r pngkt 2 . t
  = 1/3 . 22/7 . 14 pngkt 2 . 24
   = 1/3 . 22/7. 14.14 .24
  = 1/3. 44.336
   = 14.784 / 3
   = 4.928.