SOLUTION: A hollow cylindrical object has an inner radius of 3cm and an outer radius of 4cm,and a height of 8 cm.It is made of a material whose density is 5gm/cm3. Write the mass of this ob

Algebra ->  Bodies-in-space -> SOLUTION: A hollow cylindrical object has an inner radius of 3cm and an outer radius of 4cm,and a height of 8 cm.It is made of a material whose density is 5gm/cm3. Write the mass of this ob      Log On


   



Question 983991: A hollow cylindrical object has an inner radius of 3cm and an outer radius of 4cm,and a height of 8 cm.It is made of a material whose density is 5gm/cm3. Write the mass of this object in kilograms.


Answer by Alan3354(69443) About Me  (Show Source):
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A hollow cylindrical object has an inner radius of 3cm and an outer radius of 4cm,and a height of 8 cm.It is made of a material whose density is 5gm/cm3. Write the mass of this object in kilograms.
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Find the volume.
Vol = volume of a cylinder with r = 4 minus a cylinder with r = 3
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Multiply the volume by 5 --> mass in grams.
Divide by 1000