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14 January, 04:02

What is the surface area of a piece of pipe that is open at both ends, has a radius of 6 inches, and a height of 18 inches? (Use 3.14 for π.)

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  1. 14 January, 04:22
    0
    Aka lateral area

    you can imagine it like this:

    imagine you take a sheet of paper and roll it into a tube

    the lateral aera=circumference times height because if yo open the paper, the area is legnth times width, and when you roll it up, width turns into circumference

    so

    LA=h (circumference0

    LA=h2pir

    LA=18*2*pi*6

    LA=216pi

    pi=3.14 for this question

    LA=678.24

    SA=678.24 in²
  2. 14 January, 04:30
    0
    it's 2x3.14 times 6 times 18

    2π (6) (18)
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