Question

Jawab beserta caranya ya:D tadi kurang jelas

Answer 1

Verified answer

Cari garis pelukis kerucut
s = √(39-15)² + 7²
s = √24² + 7²
s = √625
s = 25

luas permukaan bangun
= luas alas tabung + luas selimut tabung + luas selimut kerucut
= π . r² + 2 . π . r . t + π . r . s
= π . r ( r +2 t + s)
= 22/7 . 7 ( 7 + 30 + 25)
= 22 . 62
= 1364cm 2
(pilihan C)

Answer 2

Cari pelukis kerucutnya
=√r²+t²
=√24²+7²
=√576+49
=√625=25

cari luas permukaan tabung tanpa ttup
=2Πrt
=2.22/7.7.15
=660

luas selimut kerucut
=Πrs
=22/7.7.25
=550

luas seluruhnya
=660+550
=1210(a)