Sea water

Mixing 62 kg of sea water with 84 kg rainwater is created water containing 3.1% salt. How many percent sea water contains salt?

Correct answer:

x =  7.3 %

Step-by-step explanation:

m1=62 kg m2=84 kg  p=3.1 %  p=100 x100 m1m1+m2  p m1+m2100=x100 m1  p (m1+m2)=x m1  x=p m1+m2m1=3.1 62+8462=7310=7310%=7.3%



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