Question
A lab technician has a 500-litre solution containing a mix
of salt and water in a 9:11 ratio. If 40% of this solution is removed and replaced with an equal amount of water, what is the new ratio of salt to water in the final mixture?Solution
ATQ;
Quantity of salt in the solution = (9/20) × 500 = 225 litres
Quantity of water in the solution = (500 – 225) = 275 litres
Quantity of solution taken out = (0.4 × 500) = 200 litres
New ratio = {225 – (225 × 0.4)} : {275 – (275 × 0.4) + 200}
= 135 : 335
= 27:67
In an examination, Ajay earned 28% of the total marks, falling short of the passing mark by 42 marks. On the other hand, Vijay achieved 41% of the total...
- For which values of x is the expression 25x - 5x² - 100 positive?
Find the difference between of the greatest among the numbers 0.82, 0.802, 0.85, 0.085 with the smallest among the numbers 0.3, 0.03, 0.203, 2.03
"PQR is a three-digit number such that it can be expressed as the sum of its three two-digit components, PQ, QR, and RP, where all of them are natural n...
- The sum of two numbers is 40 whereas the sum of their reciprocals is (10/3). Find the square of the product of the two numbers.
Aman is forming pairs of two natural numbers, A and B, such that their product equals 350. He wants to determine how many such pairs exist where A and B...
103² + 75² - 25² =?
Evaluate 2.5 ÷ 0.0005.Â
Find the average of first 24 whole numbers.
If X + Y = 23 and XY = 126, what is the value of (X)² + (Y)² ?
Relevant for Exams:
