Question

How much salt must be added to 60 kg of a 20% solution of salt to increase it to a 40%
solution of salt
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Answer 1

Answer:

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

for explanation:in 60kg, 20% is salt

i.e. 60*20/100=12kg

for being 40% the ratio would be (12+x)/(60+x)=40/100

where x is the required amount on solving the aove equation we get x=20kg.

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Answer 2

Answer:

here your answer

Step-by-step explanation:

total solution

60 kg

in this 20% salt

60×20/100=12 kg

atq

salt increase 20% to 40%

remaining 60% other solution is 48kg

60%=48

40%=?

cross multiply above

48×40/60=16*2=32

added salt is

32-12=20 kg