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17 August, 09:29

The volume of water flowing through a pipe varies directly wlth the square of the radius of the pipe. If the water flows at a rate of 80 liters per minute through a pipe with a radlus of 4 cm, at what rate would water flow through a pipe with a radius of 3 cm? (Rigorous) (Competency 007) 11. A) 45 liters per minute B) 6.67 liters per minute C) 60 liters per minute D) 4.5 liters per minute

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  1. 17 August, 11:29
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    A

    Step-by-step explanation:

    Volume varies directly with the square of the radius, so:

    V = k r²

    When V = 80, r = 4.

    80 = k (4) ²

    k = 5

    V = 5r²

    When r = 3:

    V = 5 (3) ²

    V = 45

    The flow is 45 L/min.
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