Question

Keliling alas kerucut =31,4cm garis pelukis =13cm v =3,14. Maka t=....

Answer 1

K = πd
31,4 = 3,14d
d = 31,4/3,14
d = 10
r = d/2
r = 10/2
r = 5
t = √(s²-r²)
t = √(13²-5²)
t = √(169-25)
t = √144
t = 12

Answer 2

Diket: K.alas=31,4cm
         S=13cm
         π=3,14
dit: t..?
jawab: pertama cari dulu jarijari kerucut dgn rumus=>

K.alas=2.π.r
31,4   =2.3,14.r
31,4   =6,28.r
31,4 : 6,28 = r
5 cm         = r

maka t=√s²-r²
           =√13²-5²
           =√169-25
           =√144
           =12 cm