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V = 1/3 x 154 . 24
V = 1232 cm*3
s = 25 cm
phi = 22/7
t = √s² - r²
t = √ 25² - 7²
t = √ 625 - 49
t = √ 576
t = 24cm
vol = 1/3 . phi . r² . t
= ⅓ . 22/7 . 7 . 7 . 24
= 1.232 cm³