bob the builder is making 480 kg of concrete mix concrete is made by mixing cement, sand and gravel in the ratio 1 : 3 : 4

Question

bob the builder is making 480 kg of concrete mix
concrete is made by mixing cement, sand and gravel in the ratio 1 : 3 : 4

how much sand does he need?

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Cherry 5 years 2021-08-15T05:22:22+00:00 2 Answers 336 views 1

Answers ( )

  1. ngochoa
    0
    2021-08-15T05:23:52+00:00
    Reply

    Answer:

    180 kg

    Step-by-step explanation:

    The ratio is

    cement : sand : gravel

        1       :    3     :    4

    If he used 1 kg cement, 3 kg sand, and 4 kg gravel, he’d get 8 kg of concrete.

    He wants to make 480 kg of concrete.

    480/8 = 60

    He needs 60 times more concrete than the numbers in the ratio.

    60 * 3 kg = 180 kg

    Answer: 180 kg

  2. phucdien
    0
    2021-08-15T05:24:09+00:00
    Reply

    Answer:

    If sand is 3 in the ratio, it is 180kg

    Step-by-step explanation:

    480/8=60  60 times 3 is 180

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