<PRE><B>Question 1069010</B>
A certain concrete mixture contains 5.00% cement and 6.00% sand (see the figure below). 


How many kilograms of this mixture and how many kilograms of sand should be combined with 215 kg of cement to make a batch that is 15.0% cement and 16.0% sand? Carry out all calculations exactly and round to three significant digits final answers only.
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Figure information not posted.
Cheers,
Stan H.
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