a.volome kerucut yang berpancung

Dik : Kerucut : r=7cm, t=24cm, π=22/7, La = 21cm
Dit : a. volume kerucut =.....
b. Lp kerucut =....
C. Lp kerucut dengan la 21cm =...
Jawab :
s²=r²+t²=8²+24²=64+276=√640=25.298cm

V kerucut = ⅓πr²t
=⅓×22/7×7×24
=⅓×22×24
=22×8
=176 cm³

Lp kerucut =πr(r+s)
=22/7×7(7+25.298cm)
=22×32.298
=710.556 cm²

Ls kerucut = πrs
=22/7×7×25.298
=556.556 cm
Lp kerucut (la = 21cm)
=La × Ls
=21×556.556
=11, 687.676cm²

Semoga membantu ya :)