In an alloy the ratio of copper and zinc

Asked by admin @ 16/08/2021 in Math viewed by 244 People

In an alloy , the ratio of copper and zinc is 5 :2. If 12 lbs of pure zinc is added to the alloy , the composition changes to 5/4 . How much zinc (in ) was initially present in the alloy ?

Answered by admin @ 16/08/2021

Answer:

Amount of copper =

×17.5kg=12.5kg

Amount of zinc =17.5kg−12.5kg=5kg.

Now, the amount of zinc =(5+1.25)kg

=6.25kg.

∴Required ratio=12.5:6.25=

6.25

12.5

625

1250

=2:1

Step-by-step explanation:

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