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Question 1
A mixture contains alcohol and water in the ratio 4 : 3. If 5 litres of water is added to the mixture, the ratio becomes 4 : 5. The quantity of alcohol in the given mixture is:
Question 2
A mixture of 20 litre of spirit and water contains 10% water. After adding 5 litre of water, what is the percentage of Water in the new mixture?
Question 3
A vessel has 60 litres of solution of acid and water having 80% acid. How much water should be added to make it a solution in which acid forms 60%?
Question 4
A shopkeeper mixed two varieties of rice at Rs. 20/kg and Rs. 30/kg in the ratio 2 : 3 and sell the mixture at 10% profit. Find the price per kg at which he sold the mixture?
Question 5
The average score of a class of “m” students is 70 & that of “n” students is 91. When score of both the classes are combined, the average score is 80. What is the ratio of students of both the classes?
Question 6
In what ratio must a mixture of 20% milk strength be mixed with that of 60% milk strength so as to get a new mixture of 25% milk strength?
Question 7
In a mixture, milk and water are in ratio of 2 : 3. Some milk is added to the mixture because of which ratio of milk and water becomes 2:1. How much milk was added as a percentage of initial mixture?
Question 8
A mixture contains 18% copper by weight. How much mixture (in kg) is required to obtain 81 kg of copper?
Question 9
A dishonest milkman buys milk at Rs 20 per litre and adds 1/3 of water to it and sells the mixture at Rs 25 per litre. His gain is
Question 10
How many kgs of basmati rice costing Rs.42/kg should a shop keeper mix with 25 kg of low-quality rice costing 24/kg so that he makes a profit of 25% on selling the mixture at Rs 40/kg:
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Mar 24SSC & Railway
