Question
A ship, when moving against the current, can travel a
distance of 240 km in 8 hours. If the ship's speed in calm waters is 40 km/hr, how many hours will it take to cover a distance of 150 km when moving downstream with the current?Solution
ATQ, Let, the speed of the stream be x km/hr. So, upstream speed = (40 – x) km/hr According to the question, 240/(40 – x) = 8 On solving, x = 10 km/hr So, downstream speed = 40 + x = 40 + 10 = 50 km/hr Time taken to cover the distance = 150/50 = 3 hours
- 180 litres of a mixture is made up of juice and soda in the ratio of 4:5, respectively. If 36 litres of the mixture is withdrawn and replaced with the same...
A Bartender prepares a drink mixture containing 90 ml of pure alcohol and 10 ml of vodka. He realizes that he can add more vodka to the mixture without ...
A 65-litre mixture contains only water and oil in the ratio 3:2, respectively. If 35 litres of the mixture is replaced with the same quantity of oil, th...
- In a vessel, the ratio of milk to water is 4:3. After removing 105 ml of mixture and adding 210 ml of water, the quantity of water becomes 125% more than m...
Two mixtures A and B have milk:water ratios 3:2 and 4:5. They are poured together to get 0.732 litres of mixture where milk:water in the result is 31:30...
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...
A 120 litres mixture contains 40% milk and rest water. How much water should be added to the mixture, such that milk constitutes 25% of the resultant mi...
A mixture consists of 50% water and 50% milk. 10 liters of the mixture is replaced with the same quantity of milk. If the final ratio of milk to water i...
A 600 ml mixture contains milk and water in the ratio of 3:7, respectively. If ‘x’ ml of milk as well as the same amount of water is added to the mi...
A jar has 360 liters of a syrup and water mixture in the ratio 3:2 (syrup : water). If x liters of this mixture is drawn out and replaced with water, th...
Relevant for Exams:
