Question 1096357
1 liter = 1000ml
1000-80 = 920ml is the volume of the glass tube.
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r^2Pi20 = volume of glass tube
r^2Pi20 = 920
r^2(62.83) = 920
r^2 = 14.64
r = sqrt14.64
r = 3.83 if you need to know, the radius of the glass cylinder is 3.83cm