A ball point pen has inner radius of 2mm and length of 90 mm. How many mm cube of ink will be needed to fill it?
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1.0 mm
Ballpoint pens come in various tip sizes. The most common ballpoint tips are a medium tip that is about 1.0 mm or a fine tip with is about 0.7 mm
The 'pen' part is 3.5 inches the pen and cap are just over 5 inches.
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