Question

A mixture of 100 litres of spirit and alcohol contains 25% alcohol. How much more alcohol should be added to the mixture to increase the percentage of alcohol to 30% in the new mixture?
3.33 litres
4 litres
5.67 litres
7.14 litres

Answer 1

3.33litres is the answer

Answer 2

The correct option is D) 7.14 litres

Step-by-step explanation:

Consider the provided information.

A mixture of 100 litres of spirit and alcohol contains 25% alcohol. Now we need to determine the quantity of more alcohol should be added to the mixture to increase the percentage of alcohol to 30% in the new mixture.

The ratio of the mixture to alcohol is: $\frac{100-30}{30-25}= \frac{70}{5}=14$

The required amount of alcohol  added is:

$\dfrac{100}{14}\approx7.14$

Hence, the answer is "7.14 litres.

Therefore the correct option is D) 7.14 litres

#Learn more

A wire is in the shape of a regular hexagon encloses an area of 726root3 cm2. if the same wire is bent into form a circle. find the area of the circle

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