How many bags of concrete are needed to fill the path 1m3 requires 106 x 20kg bags of concrete The pond is 7m diameter and the path around i

Question

How many bags of concrete are needed to fill the path 1m3 requires 106 x 20kg bags of concrete The pond is 7m diameter and the path around is 2m 50mm deep

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Thu Hương 5 months 2021-08-13T02:04:12+00:00 1 Answers 4 views 0

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  1. dangkhoa
    0
    2021-08-13T02:05:19+00:00
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    Answer:

    300 Bags

    Step-by-step explanation:

    According to the Question,

    • Given that, We are laying a concrete border around a circular pond.  The pond is 7 metres in diameter and is surrounded by a path 2 metres wide.

    The radius of the pool = 3.5 m; the overall radius including the border = 3.5 + 2 = 5.5m

    • The area of the concrete border

    overall area – pool area = border area(A)

    A = π×5.5² – π×3.5²

    A = 56.55 sq m  

    • The concrete needs to be 50 millimetres deep.

    the volume of the concrete, change 50 mm to .05 m

    56.55 * 05 = 2.8275 cu/meters

    • We are using premixed bagged concrete.

    1 cubic metre requires 106 x 20 kg bags.

    • So For the number of bags

    106 * 2.8275 = 299.715 ≈ 300bags

    • 300 bags of 20 kg of premixed concrete We need

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