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Coba hitung lah
L=πr²
r²=L/π=55÷22/7=55.7/22=17,5
r=√17,5
b).
V=πr²t
t=V÷πr²=11000÷22/7.√17,5²= 11000.7/22.17,5=77000/385=200 cm
c).
diameter=2√17,5=8,36 cm