Tolong dibantu ya plissssss

Diketahui:

※ Luas selimut kerucut = πrs
136π = π . 8 . s
s = 136 ÷ 8 → 17 cm

※ Tinggi kerucut = √(s² - r²)
= √(17² - 8²)
= √(289 - 64)
= √225 → 15 cm

Jawab:
Volume kerucut = 1/3 . π . (r²) . t
= 1/3 . π . (8²) . 15
= 1/3 . π . 64 . 15
= 5 . π . 64
= 320π cm³