There are two alloys of platinum, silver and gold. The first alloy is known to contain 40 per cent of platinum and the silver alloy 26 per cent of copper. The percentage of gold is the same in both alloys. Having alloyed 150 kg of the first alloy and 250 kg of the second, we get a new alloy which contains 30 per cent of gold. How many kg of platinum are there in the new alloy?
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1st Alloy 150kg is used.
40% is platinum in first alloy
10040×150=60kg of PLATINUM
2nd ALLOY 250kg is used
26% of silver =10026×250=65kg
New alloy =150+250=400kg has 30% gold =10030×400=120kg gold
since both contain same % of gold x% of 150+x% of 250=120
In second alloy 100−(30+26)=44% of platinum is there