Question

the thickness of a metal pipe is 1 cm its inner diameter is 14 cm what is the volume of metal needed for a pipe of length 1 m? ( Use π=3.14)​

Answer 1

Step-by-step explanation:

Net volume = Volume of outer cylinder - Volume of inner cylinder

Volume = pi x R²h - pi x r²h

Where R = outer radius and r = inner radius

Volume = pi x h (R²- r²)

Volume = 3.14 x 100 x [ (8)² - (7)²] ~ 1m = 100cm

Volume = 314 x ( 64-49)

Volume = 314 x 15 = 4710 cm²/ 0.47m²

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Answer 2

Answer:

11304 sq. cm

Step-by-step explanation:

given

thickness of metal pipe is 1 cm

also inner diameter is 14cm

so radius is d/2= 7 CM

thickness is 1cm

so radius is 7-1=6

also length of is 1m=100cm

therefore volume of metal of cylinder= π(r)2h

= 3.14×6×6×100

=11304 sq.cm