SOLUTION: a cylindrical drain pipe has internal and external diameter of 6.4cm and 7.6cm, respectively calculate the mass of the pipe per metre if it is made of metal of density 8 g/cm^3

Algebra ->  Surface-area -> SOLUTION: a cylindrical drain pipe has internal and external diameter of 6.4cm and 7.6cm, respectively calculate the mass of the pipe per metre if it is made of metal of density 8 g/cm^3       Log On


   

Question 1206289: a cylindrical drain pipe has internal and external diameter of 6.4cm and 7.6cm, respectively
calculate the mass of the pipe per metre if it is made of metal of density 8 g/cm^3
Answer by ikleyn(52810) About Me  (Show Source):
You can put this solution on YOUR website!
.
A cylindrical drain pipe has internal and external diameters of 6.4cm and 7.6cm respectively.
Calculate the mass of the pipe per meter if it is made of metal of density 8 g/cm^3.
~~~~~~~~~~~~~~~~~~~~~~ 


You calculate first the area of the cross section

    area = pi%2A%28D%5E2%2F4+-+d%5E2%2F4%29 = 3.14159%2A%287.6%5E2%2F4-6.4%5E2%2F4%29 = 13.194678 cm^2.



Then you calculate the volume of the 1 meter metallic pipe by multiplying the cross area by 100 cm

    volume = 100*area = 100*13.194678 = 1319.4678 cm^3.



Then you multiply the volume by the density and get the ANSWER

    the mass per meter = 8*1319.4678 = 10555.7 gram  = 10.556 kg (rounded).

Solved.