Question

Kak tolong yaaa kak... makasih ..

Answer 1

Verified answer

Mapel : Matematika
Bab : Bangun Ruang Sisi Lengkung

d = 14 cm
r = 7 cm
t tabung = 15 cm
t kerucut = 39 cm - 15 cm = 24 cm

s = √t² + r²
s = √24² + 7²
s = √576 + 49
s = √625
s = 25 cm

Luas permukaan gabungan
= Luas selimut kerucut + Luas tabung tanpa tutup
= π x r x s + π x r ( r + 2t )
= π x 7 cm x 25 cm + π x 7 cm ( 7 cm + 2 x 15 cm )
= π x 175 cm² + π x 7 cm x 37 cm
= 175π cm² + 259π cm²
= 434π cm²