bila panjang garis pelukis kerucut 13 cm dan keliling alasnya 31,4 cm maka volume kerucut adlh...

PENYELESAIAN:

Dik = s = 13 cm
kell alas = 31.4 cm
Dit = v = ?

JAWAB =
kell alas = phi × d = 31.4
= 314/100 × d = 31.4
d = 31.4 × 100/314
d = 10
* r = 5
* t = s - r
= 13 kuadrat - 5 kuadrat
= 169 - 25
= 144
= 12
t = 12

● Volume kerucut = 1/3 phi r. r. t
= 1/3 × 314/100 × 5 × 5 × 12
= 942 cm pangkat 3

SALAM SPIRIT