Algebra word problem Please HELP !!!?
A concrete mix has the ratio 1 part cement, 2 parts water, and 3part sand.How much water can be used if 78 kg of sand and 21 kg of cement are available? How much concrete can be made ?
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ok if you had 21 kgs of cement..you would use 63 kgs of sand, and 42kgs of water...because the amount of sand is 3 times that of cement in the mixture...the amount of water has to be 2 times the amount of cement so...if you had 63 kgs+42kgs+21 kgs your answer for the amount of concrete would be 126 kgs.