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t = √(13² - 5²) = √(169 - 25) = √144 = 12
Volume = 1/3 π r² t
V = 1/3 * (3,14) (5)² (12) = 314 cm²
=13²-2,5²
=169-6,25
t² =162,75
t =√162,75
t =12,8
vk = 1/3πr²t
= 1/3x3,14x2,5x2,5x12,8
=251,2/3
=83,7 cm²