Multiple choice

Two chemicals are getting mixed at a paint company to make a synthetic paint. The new mixture of 400 litres contains thinner and basecoat methyl in 25 : 6 proportion. Later, the company decides to further dilute the mixture to form a new mixture containing thinner and basecoat methyl in 2 : 1 proportion. How much basecoat methyl must they add in the previous mixture?

  1. 80.88 litres

  2. 81.88 litres

  3. 83.88 litres

  4. 86.88 litres

  5. 89.88 litres
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Initial: 400L, 25:6 ratio. Thinner = 400 * 25/31 = 322.58L. Basecoat = 400 * 6/31 = 77.42L. New ratio 2:1. Thinner remains 322.58L. New Basecoat = 322.58 / 2 = 161.29L. Added Basecoat = 161.29 - 77.42 = 83.87L.

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