Question

Dik.: kerucut
garis pelukis=13cm
keliling alas= 31,4cm
Dit.: Volume kerucut
Ada yg bisa jawab?

Answer 1

31,4=phi x d
31,4=3,14 x d
d  = 31,4 :3,14
d= 10
r=5
t^2=13^2 - 5^2
=169 - 25
=144
t=12
volume=1/3 x 3,14 x 5 x 12
            =3,14 x 5 x 4
            =62,8 cm3