Question

Diameter alas kerucut 35 cm dan tinggi 12 cm. volume kerucut adalah....
a. 2.850 cm2
b. 3.850 cm2
c. 4.773 cm2
d. 5.775 cm2

tolong jawaban yang benar yah!

Makasih

Answer 1

Dik : r = 1/2.d = 1/2.35 = 17,5
       t = 12
dit = v =...?
jwb =  V = 1/3r²
         = 1/3 × 3,14 × 17,5² × 12
         = 3.846.5 cm²

Answer 2

Volume = 1/3 x 1/4x π x d² x t
           = 1/3 x 1/4 x 22/7 x 35 x 35 x 12
           = 1/4 x 22/7 x 35 x 35 x 4
           = 22/7 x 35 x 35
           = 22 x 5 x 35
           = 3850 cm³