A boy can swim a certain distance downstream in 5 hours and return in 7 hours. If the rate of stream is 4 kmph then what is the speed of boy in still water?
Let the speed of the boy in still water be x kmph. Then, (x + 4) × 5 = (x – 4) × 7 => 5x + 20 = 7x - 28 => 2x = 48 => x = 24 kmph
Fresh watermelon contains 60% water. Dry watermelon contains 30% water. From 1 Quintals fresh Watermelon, approximately how many kgs of Dry Watermelon c...
A vessel is completely filled with milk. If 48% of the milk is replaced with water then only 130 ml of milk will be left in the vessel. What is the tota...
403 ml of mixture contains milk and water in the ratio of 8:5 respectively. If 102 ml of milk and 120 ml of water is added into it then ratio of milk to...
Quantity of water in a 420 litres mixture (alcohol + water) is 30 litres less than the quantity of alcohol in it. Find the quantity of water to be mixed...
The quantity of milk in a mixture is 80 litres more than that of water in it. 100 litres of water is added to the mixture such that the quantity of milk...
The ratio of Petrol and Diesel in the container is 3:2 when 20 litres of the mixture is taken out and is replaced by the diesel. The ratio becomes 2:3. ...
A vessel contains 210 litres of milk and water in the ratio of 5:2. If 10 litres of milk is added to the mixture, then find the ratio of milk to water i...
A mixture of 140 lit contains milk and water where milk is 20 lit more than water. If 28 lit mixture is taken out and 12 lit pure milk is added then rat...
A mixture initially has 40 liters of petrol and an unknown quantity of diesel. When 25% of the mixture is extracted into container P and 10 liters of pe...
In a ‘10Y’ litres of mixture of milk and water, the quantity of milk is 60%. According to which of the following statements the value of ‘Y’ wi...