Question

Un con circular drept are raza bazei egala cu 18 cm, iar h=24 cm.Aflati aria laterala, aria totala, volumul

Answer 1

aria laterala = (pi)G(R+r)=(pi)24(18+9)=(pi)24 x 27 =648(pi)
aria totala=aria laterala + aria bazei mari + aria bazei mici = (pi)G(R+r)+(pi)R la puterea a doua +(pi)r la puterea a doua =(pi)24(18+9) + (pi)324 + (pi)81=(pi)24 x 27 +(pi)324 +(pi)81=648(pi)+324(pi)+81(pi)=1053(pi)
volum=24 supra 3 (324 +81 +162)=8 x 567=4536centimetri la a treia