Alcohol content in 1st jar = 0.25 x 3 = 0.75 litre
Alcohol content in 2nd jar = 0.75 x 5 = 3.75 litres
Total alcohol in 9 litre cask = 0.75 + 3.75 = 4.5 litres
Percentage of alcohol in the cask = 4.5/9 x 100 = 50%
CTET Maths MCQ - Ratio Proportion and Mixture
Ratio between boys: girls = 75%: 25% = 3 : 1
Hence, number of boys = 3 × 420 = 1,260
Hence, number of boys = 3 × 420 = 1,260
Let x water to be added to make water 20% of new
mixture.
Water in old mixture = 10% of 40 = 4 l
Water in new mixture to make it 20% = (4 + x) l
Now 20% of (40 + x) l = 4 + x
Solving equation, we get x = 5 l.
Water in old mixture = 10% of 40 = 4 l
Water in new mixture to make it 20% = (4 + x) l
Now 20% of (40 + x) l = 4 + x
Solving equation, we get x = 5 l.
