Question

kak tolong bantu jawab soal ini​

Answer 1

L kerucut besar = phi x r x (r + s)
= 3,14 x 10 x (10 + (12 + 8))
= 31,4 x (10 + 20)
= 31,4 x 30
= 942 cm^3

L kerucut kecil (yang garis putus2) = phi x r x (r + s)
= 3,14 x 5 x (5 + 8)
= 15,7 x 13
= 204,1 cm^2

L kap lampu = 942 - 204,1 = 737,9 cm^2