Question

Volume suatu kerucut 1.256 cm3. jika tinggi kerucut 12 cm dan V=3,14, hitunglah panjang jari2 kerucut tersbt!

Answer 1

V = 1/3 La x t
1256 = 1/3  r2 (kuadrat) x 12
1256 = 1/3 x 3,14 x r2 x 12
1256 = 4 x 3,14 x r2
1256 = 12,56 x r2
r2 = 1256 : 12,56
r2 = 100
r = 10

Answer 2

. . r . r . t

1/3 . 3,14 . r2 . 12 = 1256
3,14 . r2 . 4 = 1256
3,14 . r2 = 1256/4
3,14 . r2 = 314
r2 = 100
r = 
r = 10