A tank contains 10000 gallons of water out of which 5% is sodium chloride. When 2500 gallons water is evaporated, remaining solution contains what percent of sodium chloride?

a. 4.32%
b. 6.67%
c. 11%
d. 12.33%

• ANS: 6.67%
  Thought process:
  10000 gal of water contains (10000*0.05)=500 gal of Sodium Chloride.
  So if 2500 gal of water evaporates, the Sodium Chloride in the solution remains the same. Remaining water = 10000-2500 gals = 7500 gal. Therefore, its (500/7500)=6.67%
• 11 years agoHelpfull: Yes(29) No(0)
• 5% of 10000 gal of water = 500 gal.
  Altough water is evaporated but amount of NaCl is same throughout.After evaporation remaining water = 7500gal
  % of NaCl = (500/7500)*100 = 6.67%
• 11 years agoHelpfull: Yes(6) No(0)
• 6.67% as after 2500 gallons of water is evaporated, only 7000 gallons of water is left...so
  500/7500*100
• 11 years agoHelpfull: Yes(1) No(0)
• 6.66%ans. 500 g in 10000 g
  
• 11 years agoHelpfull: Yes(1) No(0)
• 5% in 10000= 500gms.
  now 500gms in (10000-2500)=7500 gallons is (500/7500)*100=6.67%
• 11 years agoHelpfull: Yes(0) No(0)
• 6.67% is the answer
  the amount of sodium chloride remains the same, so calculate in 7500 gallons equals 6.67%
• 11 years agoHelpfull: Yes(0) No(1)