Question

An alloy contain 40 percent copper , 30 percent nickel and rest zinc . Find the mass of zinc in 1 kg of alloy

Answer 1

3.33kg

Step-by-step explanation:

30 percent of zinc=1kg So mass of alloy=(1×100)÷30=3.33Kg. Mark as brainlist

Answer 2

Answer:

The mass of zinc in 1 kg of an alloy is 300 gram

Step-by-step explanation:

Given as :

An alloy contain ,

The copper percentage = 40%

The nickel percentage = 30%

Let The zinc percentage = x%

Or, x = 100 % ( % copper + % nickel)

So, x = 100% - ( 40% + 30%)

Or, x = 100% - 70%

∴   x = 30%

So, The zinc percentage in alloy = 30%

Again

The mass of alloy = 1 kg = 1000 g

∵ % of zinc in alloy = 30% of total alloy mass

So, The mass of zinc = 30 % × 1000

Or, The mass of zinc = $\dfrac{30}{100}$ × 1000 = 300 g

Hence, The mass of zinc in 1 kg of an alloy is 300 gram . Answer