Question

sea water contains 5% salt by weight . how many kg of fresh water must be added to 60 kg of sea water for the content of salt in solution to be made 3% .​

Answer 1

Answer:

40kg

Step-by-step explanation:

The amount of salt in seven kg of sea papa = 60kg ×5% = 60×5/100kg = 3kg

Suppose x kg of water was mixed in this sea water, then

A/Q,

new mix = 60+x kg and salt = 3kg

so,

(3/60+x)×100 = 3

or,

300 = 180+3x , 3x = 120 , x = 40kg

Therefore, 40kg of water should be added to sea water.