Question

18. An alloy contains 40% copper, 32% nickel and rest zinc. Find the mass of zinc in one keer
the alloy
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Balanced diet should contain 100% of proteine
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Answer 1

Answer:

copper =40% of 1 kg

=40/100 x 1000gram

=400gram

Nickel = 32% of 1 kg

= 32/100 x1000

=320 gram

Copper +Nickel+zinc =1000gram

400 +320+ zinc =1000

zinc = 1000-(400+320)

=1000- 720

=280 gram

Ans is 280 gram

Answer 2

Answer:

Mass of zinc in 1kg of alloy is 280 grams.

Step-by-step explanation:

alloy contains,32% of copper

40% of nickel

Remaining zinc

mass of alloy= 100 grams

Mass of copper in alloy =(1000/100)x32

                                       =320 grams

Mass of nickel in alloy=(1000/100)x40

                                   = 400 grams

So, mass of zinc in alloy=100-(320+400)

                                       =100-720

                                       =280 grams

Therefore, mass of zinc in 1kg of alloy is 280 grams