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Question: 1 / 400

A 1-2-3 mixture of concrete means:

1 part sand, 2 parts gravel, 3 parts water

A 1-2-3 mixture of concrete means that it consists of 1 part cement, 2 parts sand, and 3 parts gravel. This is a commonly used ratio in construction to achieve a strong and durable concrete mix.

Option B, 1 part cement, 2 parts sand, 3 parts gravel, is the correct combination for a 1-2-3 mixture of concrete. This mixture provides a balance of cement for strength, sand for workability, and gravel for durability in the final concrete structure.

Options A, C, and D do not follow the standard 1-2-3 mixture ratio, making them incorrect choices for this question.

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1 part cement, 2 parts sand, 3 parts gravel

1 part water, 2 parts sand, 3 parts cement

1 part gravel, 2 parts cement, 3 parts sand

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