A house was painted blue and white.15 litres of white paint was used. What volume of blue paint was used, when the ratio of blue paint is 5:2​

37.5 litres

Explanation:

Given that:

House was painted blue and white in the ratio ;

Blue : white = 5 : 2

Volume of white paint used = 15 litres

Sum of ratio = 5 +2 = 7

Volume of white paint used = (white ratio / Total ratio) * total volume of paint used

Let total volume used = x

15 = (2 /7) * x

15 = 0.2857142 * x

x = 15 / 0.2857142

x = 52.5 litres

Hence, volume of blue paint used :

Total volume - volume of white paint used

52.5 - 15

= 37.5 litres

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