SOLUTION: how many pounds of silver and of lead should be be added to 100 pounds of a mixture containing 10% silver and 25% lead to obtain an alloy containing 20% silver and 40% lead.
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Question 819693: how many pounds of silver and of lead should be be added to 100 pounds of a mixture containing 10% silver and 25% lead to obtain an alloy containing 20% silver and 40% lead.
You can put this solution on YOUR website! how many pounds of silver and of lead should be be added to 100 pounds of a mixture containing 10% silver and 25% lead to obtain an alloy containing 20% silver and 40% lead.
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sil + sil = sil
0.10*100 +1*x = 0.20*(100+x)
10*100 + 100x = 20*100 + 20x
80x = 10*100
x = 12.5 lbs (amt of pure silver to add)
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lead + lead = lead
0.25*100 + 1*x = 0.40(100+x)
25*100 + 100x = 40*100 + 40x
60x = 15*100
x = 25 lbs (amt of pure lead to add)
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Cheers,
Stan H.
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