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white paint and red paint are mixed in the ratio of 2 : 3 to make 15 litres.

 

How much more red paint needs to be added so that the ratio of white to red paint becomes 1 : 5?

 

Thanks

 May 18, 2018
 #1
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3 /[2+3] x 15 = 9 Liters of red paint

2 /[2+3] x 15 =6 Liters of white paint

 

6 / [9 +R] = 1/5

R = 21 Liters of red paint must be added to get a ratio of 1 : 5, or:

6 : [9 + 21] = 6 : 30 = 1 : 5

 May 18, 2018

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