Nomor 13 dong thanks

L. selimut kerucut = "pi"rs
188,4 = 3,14 × r × 10
r = 188,4/31,4
r = 6 cm
tinggi = √10^2 - √6^2
= √100 - √36
= √64
= 8 cm

V. kerucut = 1/3"pi"r^2t
= 1/3 × 3,14 × 6^2 × 8
= 301,44 cm^2