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Thanks! i forgot to calculate radius and was recklessly using value of D in the formula (4/3)*pi*r^3You get diameter 4.81mm so for radius d/2 and convet mm to m.
In m 4.81/2/1000
Next u find the volume using 4/3pi r^3
Density =mass(kg)/volume(m^3)
Convert g to kg 0.450/1000 ÷vol and you get C as the answer.
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