Let speed of boat in upstream and downstream be ‘7x’ km/h and ‘9x’ km/h respectively. 119/7x + 162/9x = 7 17/x + 18/x = 7 35 = 7x x = 5 Speed of boat in still water = (7x + 9x)/2 = 8x = 8 × 5 = 40 km/h Desired time = 180/40 = 4.5 hours
A mixture contains ‘x’% milk. 20% of this mixture is taken out and is replaced with same quantity of water. This procedure is repeated two more time...
364 ml of mixture ‘A’ contains milk and water in the ratio 2:5 respectively. If the quantity of milk in mixture ‘B’ is 37.5% more than that in m...
In a mixture of milk and water, the quantity of water is 50% more than the quantity of milk. If 16 liters of water is mixed into it, then the quantity o...
A container has only two types (P and Q) of oil in the ratio 3:2 respectively. When 90 litre of oil Q is added to the containerthe quantity of oil P bec...
How many kilograms of rice cost Rs. 60 per kg? must be mixed with 26 kg. of rice costing Rs. 42 per kg. so that there may be a gain of 12% by selling th...
A container contains Alcohol and water in ratio of 4:3 and Capacity of Container is 28 lit. If half of the Container is replaced with 25 lit of water th...
In a mixture of 105 liters, the ratio of milk to water is 4: 1. In another mixture of 90 liters, the ratio of milk to water is 3: 2. What is the positiv...
A container holds a mixture of two liquids, A and B, in the ratio 2:3. If the total volume of the mixture is 70 liters, how many liters of liquid A must...
A 250 litres mixture contains milk and water in the ratio 4:1 respectively. If 20% of the mixture is replaced with the same quantity of water, then find...
55% of the original 'a' liters of pure petrol is taken out from a container and replaced with 66 liters of Methanol, ensuring the total quantity of the ...
