Question

.
In an alloy, copper and zinc are mixed in a certain ratio. If the alloy contains 80% zinc, how
many kg of copper is present in 40 kg of the alloy ?​

Answer 1

Answer:

alloy is made up of 80%zinc

so mass of alloy:

80/100×40

=32

32kg of zinc is used in the alloy .

so the mass of copper will be:

40-32

=8

8kg of copper is used in the alloy