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Question: 1 inside d od 2 thickness t a...

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A fluid that has a relative density of 0.013 is passed through a pipe that has an outer diameter of 98 mm and a wall thickness of 10 mm. The mass flow rate of the fluid measured to be 660 kg/min, determine the average velocity of the fluid through the pipe. O A) 177.17 m/s B) 84.95 m/s C 225.63 m/s D) 524 m/s

1) inside D = OD - 2 (thickness t)
A (Area) =pi/4 (D^2)
Volumetric flow (V)= (C m/s) (A m^2)
C=velocity
I can't figure out the density kg/m^3
rho= 1/v (m^3/kg) - specific volume

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