Question
A container contains 40 liters of a mixture of milk and
water in the ratio 3:1. How much water should be added to make the ratio 3:2?Solution
Milk = (3/4) * 40 = 30 liters Water = (1/4) * 40 = 10 liters Let x liters of water be added. New ratio = Milk : Water = 30 : (10 + x) = 3:2 30 / (10 + x) = 3 / 2 60 = 30 + 3x 3x = 30 x = 10 liters Correct answer: d.
Speed of current is equal to 15% of speed of boat in still water. If the boat takes 3 hours to cover 120 km in still water, then find the time taken by ...
The speed of current is 29 km/hr. If the speed of the boat in still water had been 17 km/hr more than the original speed then it would take 6.2 hours to...
Before rain a boat can cover 90 km in still water and the same distance upstream in 6 hours and 9 hours, respectively. Due to the rain the speed of the ...
If Boat goes 80 km upstream in 4 hours and 60 km downstream in 2 hours, then the speed of the boat in still water is
A boat moves in a river where the ratio of the speed of the stream to the downstream speed of the boat is 1:6. If it takes the boat a total of 20 hours ...
Find the total distance covered by boat in each upstream and downstream in 5 hours if the speed of boat in still water and speed of current is 25 km/h a...
Motor boat covers a certain distance downstream in a river in 20 hours. It covers the same distance upstream in 30 hours. If the speed of the water is 1...
When travelling downstream, a boat takes 5 hours to travel 300 km. If the speed of the stream is (2/5)th of downstream speed of the boat, the...
Boat ‘A’ covers 150 km in downstream in 15 hours. If the speed of stream is 2 km/hr then find the time taken by boat ‘A’ to cover 108 km in upst...
A boat covers 30 km downstream in 60 minutes. If the ratio of the speed of the boat in still water to that of the speed of the stream is 8:4, respective...
Relevant for Exams:
