The external radius of a 14 cm long metallic pipe is 9 cm and the pipe is 1 cm thick. find the volume of the metal used in the pipe. if the mass of 1 cm^3 metal is 8.5 gram. find the mass of the pipe.
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Answer:
External radius = 9 cm
Internal radius = ( external radius) - ( thickness )
= (9-1) cm
= 8 cm
Volume of metal in pipe= πh(R²- r²)
= 22/7×14×(81-64)
= 22/7×14×17
= 22×4×17
= 44×17
= 748 cm³
Given,
Mass of 1 cm³ metal=8.5g
Therefore,
Mass of 748 cm³ metal= 8.5×748
= 6.358g
Step-by-step explanation:
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