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200 g of 20 % w / w urea solution is mixed with 400 g of 40 % w / w urea solution. What is the weight percentage (w/w %) of resultant solution?

Options

  1. A30.33
  2. B33.33
  3. C36.33
  4. D28.33

Correct answer

B. 33.33

Step-by-step solution

200 g of 20 % urea contain 40 g urea in 200 g solution 400 g of 40 % urea contain 160 g urea in 400 g solution. Total amount of solution =600 ~g Total amount of urea in solution =200 ~g Hence, Weight % of urea in solution = 200 600 100=33.33 %

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