Bunuel wrote:

Paint needs to be thinned to a ratio of 2 parts paint to 1.5 parts water. The painter has by mistake added water so that he has 6 litres of paint which is half water and half paint. What must he add to make the proportions of the mixture correct?

A. 1 litre paint

B. 1 litre water

C. ½ litre water and one litre paint

D. ½ litre paint and one litre water

E. ½ litre paint

Hi Bunuel ,

Instead of using part to part , I am using part to whole , approach, why am I not getting the answer !

\(\frac{paint }{ Total \hspace{1mm}quantity}\)=\(\frac{2}{3.5}\) -> Required ratio

Finally after adding x liters of paint to 3 liters of paint already present the ratio of paint to total mixture is \(\frac{3+x}{6}\)

Hence equating the proportions \(\frac{2}{3.5}=\frac{3+x}{6}\)

x = \(\frac{3}{7}\)

Whys is x not coming to 1?

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- Stne