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= √841 - 441
= √400
= √400
= 20
V = 1/3 πr²t
= 1/3 × 22/7 × 21 × 21 × 20 = 9240 cm³
t² = s² - r²
t² = 29² - 21²
t² = 841 - 441
t² = 400
t = 20 cm
Volume kerucut = 1/3 x πr² x t
= 1/3 x 22/7 x 21 x 21 x 20
= 9240 cm