Mathematics, 23.03.2020 23:31, brae72

A contractor requires a cement mix that is 70% sand and 30% cement. He has 1400 kg of a cement mix that is 80% sand and 20% cement. How much cement should he add to this 1400 kg cement mix so that he gets the required mix?

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A contractor requires a cement mix that is 70% sand and 30% cement. He has 1400 kg of a cement mix t...