What weight of the first alloy should be mixed with some weight of second alloy

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What weight of the first alloy should be mixed with some weight of second alloy

Gayathri

There are two kinds of alloys of tin and copper.The first alloy contains tin and copper such that 93.33% of it is tin.In the second alloy there is 86.66% tin.What weight of the first alloy should be mixed with some weight of second alloy so as to make a 50kg mass containing 90% of tin?
15kg
30kg
20kg
25kg

Maniraj

Gayathri
90 is between 86.66 and 93.33
86.66 to 90 is 3.33
90 to 93.33 is 3.33
So equal proportion of both should be mixed.
Since we need 90% tin in 50KG (45KG tin)
we need to add 22.5 kg each.

Rajyalakshmi12

The ratios comes out to be 1:1.
So, tin is 1/2*50=25