Bronze, tin and copper

Bronze is an alloy of tin and copper. An alloy of 10% tin and 90% copper is Gunmetal. It is bell metal if it contains 20% tin and 80% copper. How many tons of molten bell metal and copper are needed to make 100 tons of Gunmetal?

Correct answer:

z =  50 t
c =  50 t

Step-by-step explanation:

m=100 t p1=10%=10010=101=0.1 p2=90%=10090=109=0.9 p3=20%=10020=51=0.2  a=m p1=100 0.1=10 t b=m p2=100 0.9=90 t z   p3 = a z=a/p3=10/0.2=50 t
c=mz=10050=50 t



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