Bissoy.com
Doctors Medicines MCQs Q&A

A shopkeeper combined X liters of a solution containing 10% of certain material Q, with 10 liters of another solution that contained 2% of that materiale Q, to produce Z liters of a solution that had 5% of Q. What is the value of X?

A shopkeeper combined X liters of a solution containing 10% of certain material Q, with 10 liters of another solution that contained 2% of that materiale Q, to produce Z liters of a solution that had 5% of Q. What is the value of X? Correct Answer 6 liters

Hints: x লিটার Q উপাদান আছে = x এর 10/100 = x/10 10 লিটার Q উপাদান আছে = 10এর 2/100 = 1/5 Z লিটারে Q উপাদান আছে = ( x + 10) এর 5/100 = (x + 10)/20 শর্তমতে, x/10 + 1/5 = (x + 10) / 20 10x + 20 = 5x + 50 10x - 5x = 50 - 20 5x = 30 x = 6

Related Questions

In a village 50% of the villagers produce rice, 40% of the villagers produce apples and 50% of the villagers produce vegetables, 20% of the villagers produce rice and apples both, 25% of the villagers produce apples and vegetables both, 20% of the villagers produce rice and vegetables both and 10% of the villagers produce all three. Find the percentage of villagers who do not produce anything.
A 60% spirit solution is mixed with r% spirit solution in the ratio 1 : 3 such that a s% spirit solution is obtained. When a (s/3)% spirit solution is mixed with 55% spirit solution in equal ratio, an (r/2)% spirit solution is obtained. Which of the following can be determined? (A) Value of ‘r’ (B) Value of ‘s’ (C) Volume of the 60% spirit solution mixed initially (D) If 9 liters of r% spirit solution was mixed initially, what was the volume of the s% spirit solution thus obtained?
Two barrels of 25 liters and 40 liters respectively are filled with the mixture of milk and water in the proportion of 12 : 5 and 14 : 7. If 75% amount of the barrels is transferred to a tank which is filled with 15 liters of milk and 7 liters of water, then the proportion of water to milk in the mixture contained in the tank is?
From the 50 liters of milk, 5 liters of milk is taken out and after it 5 liters of water is added to the rest amount of milk. Again 5 liters of milk and water is drawn out and it was replaced by 5 liters of water. If this process is continued similarly for the third time, the amount of milk left after the third replacement:
A shopkeeper has a mixture of 160 liters contained Milk and water in the ratio of 6 ∶ 2. If 10-liters milk and 20-liters water will be added to the mixture then what will be the new ratio of Milk and water?
A solution has 15% sugar. Another solution has 5% sugar. How many liters of the second solution must be added to 20 liters of the first solution to make a solution of 13% sugar?
A jar contains alcohol solution in which there is 120 liters of alcohol, The ratio of alcohol and water is 8 : 3. If 55 liters of this solution is taken out and 18 liters of water is added to the resultant solution then what is the percentage of water in the final solution out of the alcohol initially present?
There are two shopkeepers, first shopkeeper calculates his profit percent on the selling price whereas the second shopkeeper calculates his profit percent on the cost price. If the selling price for both the shopkeeper is same and the difference between their profits is Rs.175. Then, calculate the sum of the cost price for both the shopkeeper if the profit percent for the both shopkeeper is 25%?
A chemical solution appears green when the salt concentration is 8 grams per litre (gpl) and red when it is 10 gpl. Pure water was added to the solution of 1 litre of 15 gpl solution till it turned green. Then 125 ml of the green solution is taken out and x grams of salt is added to the green solution to make it red. Another 500 ml of the final solution was taken out and y litres of green solution is added to get a resultant solution of concentration 9.6 gpl.  Assume adding salt doesn’t change its volume and find the ratio of x and y. 
In a survey of 25 students, it was found that 15 had taken Mathematics, 12 had taken Physics and 11 had taken Chemistry, 5 had taken Mathematics and Chemistry, 9 had taken Mathematics and Physics, 4 had taken Physics and Chemistry and 3 had taken all the three subjects. Find the number of students who had taken both Physics and Chemistry but not Mathematics.