Question
The difference between the value of the number increased
by 20% and the value of the number decreased by 30% is 120. Find the number.Solution
Let the number be x. According to the question, x × (120/100) - x × (70/100) = 120 120x - 70x = 12000 50x = 12000 x = 240
A 120-litre mixture contains 25% alcohol. How many litres of alcohol should be added so that alcohol becomes 40% of the final mixture?
A 320 litre mixture of water and acid contains 80 litres more water than acid. If 25% of the mixture is removed and then ‘k’ litres of acid is adde...
An 84-litre mixture contains 75% milk. If 'x' litres of water are added to this mixture, the quantity of milk in the resulting mixture becomes 27 litres...
A 20 L solution contains 30% sugar. How much water should be added to make the sugar 20% of the new solution?
Mixture 'P,' comprising both milk and water, is combined with another mixture 'Q' (consisting of milk and water) in a ratio of 3:2, respectively. The ...
Two vessels A and B contain mixture of milk and water. Ratio of milk and water in vessel A and B are in the ratio 1:2 and 3:2 respectively. In what rati...
Mixture A has juice and water in a ratio of 3:5, while mixture B has juice and water in a ratio of 5:4. If these two mixtures are combined in a 2:3 rati...
2 Kg of sugar at Rs 30 per Kg is mixed with 3 Kg of 2nd type of sugar to get a mixture costing Rs 46 per Kg. Find the price of the costlier sugar
A 420 litre mixture contains only milk and water in the ratio 5:2 respectively. If 'x' litre of water is added to the mixture, then ratio of milk and w...
A container was initially filled to the brim with milk. After removing 52% of the milk, 348 ml remained in the container. Calculate the original volume ...
Relevant for Exams:
