| 1. | A vessel has 60 litres of solution of acid and water having 80% acid. How much water be added to make it a solution in which acid forms 60% ? | |
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48 litres
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20 litres
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36 litres
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None of these
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Report Question| 2. | A sugar solution of 3 litre contain 60% sugar. One litter of water is added to this solution. Then the percentage of sugar in the new solution is ? | |
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30
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45
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50
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60
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| 3. | A sugar solution of 3 litre contain 60% sugar. One litter of water is added to this solution. Then the percentage of sugar in the new solution is ? | |
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30
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45
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50
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60
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| 4. | 200 litres of a mixture contains 15% water and the rest is milk. The amount of milk that must be added so that the resulting mixture contains 87.5% milk is ? | |
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30 litres
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35 litres
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40 litres
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45 litres
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| 5. | How much water must be added to 100 ml of 80 per cent solution of boric acid to reduce it to a 50 percent solution ? | |
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30 ml
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40 ml
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50 ml
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60 ml
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| 6. | 75 gm of sugar solution has 30% sugar in it. Then the quantity of sugar that should be added to the solution to make the quantity of the sugar 70% in the solution, is ? | |
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125 gm
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100 gm
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120 gm
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130 gm
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| 7. | A sample of 50 litres of glycerine is found to be adulterated to the extent of 20%. How much pure glycerine should be added to it so as to bring down the percentage of impurity to 5% ? | |
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155 litres
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150 litres
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150.4 litres
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149 litres
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| 8. | Price of a commodity has increased by 60%. By what percent must a consumer reduce the consumption of the commodity so as not to increase the expenditurePrice of a commodity has increased by 60%. By what percent must a consumer reduce the consumption of the commodity so as not to increase the expenditure ? | |
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37%
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37.5%
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40.5%
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60%
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| 9. | If the price of a commodity is decreased by 20% and its consumption is increased by 20%, what will be the increase or decrease in the expenditure on the commodity ? | |
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4% increase
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4% decrease
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8% decrease
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8% increase
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| 10. | The price of a commodity rises from 6 per kg to 7.50 per kg. If the expenditure cannot increase, the percentage of reduction in consumption is ? | |
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15%
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20%
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25%
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30%
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