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25 November, 10:41

You want to fill the cylinder shown below with water. All you have is a container shaped like a cone with a radius of 3 inches and a height of 7 inches; you can use this cone-shaped container to take water from a faucet and fill the cylinder. How many cones will it take to fill the cylinder? Explain your reasoning.

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  1. 25 November, 12:41
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    n = 9.14 ≈ 10 cones (if integer is required)

    Step-by-step explanation:

    Given:

    - The dimensions of the cylinder "missing from this question" are:

    Radius r_1 = 8 in, Height h_1 = 3 in

    - The dimensions of faucet are:

    Radius r_2 = 3 in, Height h_2 = 7 in

    Find:

    - How many cone shaped like containers are required to fill the cylinder.

    Solution:

    - We will denote the letter 'n' as the number of cone shaped containers.

    - For n amount of cone shaped containers is to fill the container the volume of water of n container should equal the volume of water in cylinder. This can be expressed as follows:

    n*V_cone = V_cylinder

    - Where,

    V_cone = (1 / 3) * pi * r^2 _2 * h_2

    V_cylinder = pi*r^2_1*h_1

    - Hence,

    n = V_cylinder / V_cone

    Plug in values:

    n = (3*r^2_1 * h_1) / r^2_2 * h_2

    n = (3 * 8^2 * 3) / (3^2 * 7)

    n = 576 / 63 = 9.14 cones

    Answer: n = 10 cones
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