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550 cm2 = 22/7 × r × 25 cm
550 cm2 = 78,5 cm × r
r = 550 cm2 / 78,5 cm
r = 7 cm
Tinggi² = s² - r²
Tinggi = √s² - r²
=√25² - 7²
=√626 - 49
=√576
= 24 cm
v = 1/3 πr² × t
= 1/3 22/7 × (7 cm)² × 24 cm
= 1232 cm³