Multiple choice

A person has a chemical of Rs. 50 per litre. In what ratio should water be mixed in that chemical so that after selling the mixture at Rs. 40 per litre he may get a profit of 50%?

  1. 8:7

  2. 9:8

  3. 4:3

  4. 10:7
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

To achieve 50% profit when selling at Rs. 40/litre, the cost price must be 40/1.5 = Rs. 26.67/litre. Using alligation, water (cost 0) and chemical (cost Rs. 50) must mix in ratio 8:7 to get cost price of Rs. 26.67, since (50-26.67):26.67 = 23.33:26.67 = 7:8, giving water:chemical = 8:7.

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