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r= 7/2
untuk 1/4 kaleng
v= pi r^2 t
69300 = (22/7) (7/2)^2 t
69300= (22/7)(7^2/2^2) t
69300= (22/2^2) 7t
69300= 154/4 t
t = (69300)/(154/4)
t= 1800 cm
t untuk seperempat = 1800 maka tinggi satu kaleng sama dengan 4 x 1800= 7200 cm