Question

6. There are 90% copper and 10% zinc in an alloy, there are 3% copper and 10% zinc in other alloy. The alloys are mixed in the ratio 5:1 then find the percentage of copper in new alloy (1) 75.5% (2) 104.5%​

Answer 1

Answer:

ans:78.84%

Step-by-step explanation:

c:z=9:1 and in 2nd alloy 3:10

make similar

c:z=117:13 and 30:100

c:z=585:65 and 30:100

615/780*100=78.84