Question

Tolong dijawab ya..
Pake cara

Answer 1

12)t² = s²-r²
= 13²-5²
= 169-25
= 144
= √144
= 12
v. kerucut = 1/3πr²t
= 1/3π×5×5×12
= 100π cm³(B)
jdkan jawaban yg terbaik ya...please

Answer 2

No. 8
dik: Vt = 175 phi
d = 10, maka r = 5
dit: Lt = ...?
jwb:
Vt = phi x r^2 x t
175 x phi = 3,14 x 5^2 x t
175 x 3,14 = 3,14 x 25 x t
175 = 25 x t
t = 7

Lt = 2 x phi x r (r + t)
= 2 x phi x 5 (5 + 7)
= 10 x phi (12)
= 120 phi (a)