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Math Help - cross sectional area

  1. #1
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    Question cross sectional area

    A cylindrical pipe of diameter 1.5m contains water to a depth of 0.9m.

    a) find the cross sectional area of the water

    b) if the water is flowing at a rate of 60 litres per second find the speed of the water in meters per second
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  2. #2
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    A) Diameter = 1.5m, so Radius is 0.75m.

    Cross-sectional area is a circle with radius 0.75m. So A=\pi (0.75)^2 \approx 1.77m^2

    B) \frac{60L}{s} \times \frac{.001 m^3}{1L}
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  3. #3
    Grand Panjandrum
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    Quote Originally Posted by si55ler View Post
    A cylindrical pipe of diameter 1.5m contains water to a depth of 0.9m.

    a) find the cross sectional area of the water

    b) if the water is flowing at a rate of 60 litres per second find the speed of the water in meters per second
    The area you seek is the shaded area in the attachment.

    If this area is A, and the speed of the water is v m/s then the volume flow rate is Av cubic metres/s
    or 1000 Av ltrs/s.

    RonL
    Attached Thumbnails Attached Thumbnails cross sectional area-gash.jpg  
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