Question

How much salt must be added to 60kg of a 20% solution of salt to increase it to a 40% solution of salt ?​

Answer 1

Answer:

20 kg

Step-by-step explanation:

Required salt=60*(40-20)/(100-40)=20kg

Answer 2

$\huge \underline \mathbf \red{Question ⤵}$

How much salt must be added to 60kg of a 20% solution of salt to increase it to a 40% solution of salt ?

$\huge \underline \mathbf \blue{Solution⤵}$

TO FIND : HOW MUCH SALT SHOULD BE ADDED ?

Let the required qty of salt that is added in the

solution to make the ratio 40%: 60% be x kg.

In the current solution the qty of salt = 20% of 60kg = 60×20/100 = 12kg

The qty of water or any other substance in the solution would be 60 kg-12 kg = 48 kg

Let us add the xkg in the the solution. Now the qty of salt in the solution = x kg + 12 kg.

The new ratio of salt and water = 40 %: 60 % or = 2:3

So as per question x kg +12 kg/ 48 kg should be equal to 2:3 or x kg +12 kg/ 48 kg = 2/3 After cross multiplication

3x kg + 36 kg = 96

3x = 96-36 = 60

X = 20 kg