Let the speed of the boat in upstream be ‘2x’ km/h and in downstream be ‘3x’ km/h, respectively. According to the question: 
Speed of the boat in still water = (2x+3x)/2 = (5×14.4)/2 = 36 km/h.
Quantity -I: P and Q started a business together with an initial investment of Rs. 4000 and Rs. 3200, respectively. After 4 months, R joined with an in...
Quantity-I: Pipe P fills an empty tank in 25 hours, while pipe Q fills it in 40 hours. If the tank is initially 36% full, pipe ...
Quantity-I: A mixture contains 40% milk and the rest 240 litres water. When (x−10) litres of water and (x+8) litres of milk are added to this mixtur...
Quantity I: The price of rice is decreased by 30%, by how much % the consumption is increase so that the expenditure will decreased by 10%?
Qu...
Quantity-I: A mixture contains 50% milk and the rest 360 litres water. When (x −15) litres of water and (x+10) litres of milk are added to this mixt...
Quantity I : A Alone can complete a work in 21 days. If be alone work for eight days and then leaves, then B alone can complete the remaining work ...
Quantity I: A student multiplied a number by 3/5 instead of 5/3 . What is the % error in the calculation?
Quantity II: The population of a town i...
In the question, two quantities I and II are given. You have to solve both the quantities to establish the correct relation between Quantity-I and Quan...
The ratio of present ages of A and B is 5:8 respectively and the average of present ages of A and C is equal to 80% of the present age of B. 4 years ago...
Quantity I: A bag contains 5 red, 7 blue, and 8 green balls. Two balls are drawn randomly. What is the probability that both balls drawn are green?
...
