SOLUTION: a hallow metal sphere with internal radius 2.1 cm and external radius 3.5 cm .find its mass to the nearest gram given that the mass of a cubic centimeter of such a metal is 20 gm .

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Question 820399: a hallow metal sphere with internal radius 2.1 cm and external radius 3.5 cm .find its mass to the nearest gram given that the mass of a cubic centimeter of such a metal is 20 gm .
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
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a hallow metal sphere with internal radius 2.1 cm and external radius 3.5 cm .
find its mass to the nearest gram given that the mass of a cubic centimeter of such a metal is 20 gm .
:
find the volume in cu/cm
V = 4%2F3pi%2A3.5%5E3 - 4%2F3pi%2A2.1%5E3
v = 179.594 - 38.792
v = 140.8 cu/cm
Find the mass
140.8 * 20 = 2,816 grams