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t tbg = 14 cm
vol tbg 1 = La . t
= phi . r² . t
= 22/7 . 6² . 14
= 1.584 cm³
r tbg 2 = 1½ × 6 = 3/2 × 6 = 9cm
vol tbg 2 = phi . r² . t
= 22/7 . 9² . 14
= 3.564 cm³