Question

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

Answer 1

Step-by-step explanation:

amount of salt=20% of the solution=20/100*60=12

let the amount of salt added be x.

so,

amount of salt=12+x

amount of solution=60+x

Atq,

12+x/60+x=40/100

12+x/60+x=2/5

(12+x)*5=(60+x)*2

60+5x=120+2x

5x-2x=120-60

3x=60

x=20.

SO the amount of salt added is 20.

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