Question

How much copper must be mixed with 156 kg of sulphur to make an alloy of which 25% is

sulphur and the rest is copper​

Answer 1

Answer:

Let the total weight of alloy be x kg.

Weight of sulphur given is 156 kg.

According to condition,

25% of x = 156

or, x = 156×100/25

or, x = 624

So, percentage of copper in alloy is (100-25)%

= 75%

Therefore, 75% of 624 kg

= 468 kg

Therefore, 468 kg copper should be mixed.

Hope it helps you

Answer 2

Answer:

468 kg

Step-by-step explanation:

let the total price of alloy be x kg

weight of sulphur =156 kg

According to the question

25% of x =156

x=156×100/25

x=624

So, percentage of copper in alloy is (100-25)%

=75%

Therefore,75%of 624 kg

=468 kg

Therefore ,468 kg copper should be mixed

Hope it is helpful

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