Question
In x litres of a solution of acid and water, acid is
62.5%. When 12 litres of acid is added to the solution, the ratio of acid and water in the resulting solution becomes 13 : 7. What is the value of x?Solution
The acid in the solution = 62.5% of x (5/8) x The water in the solution = (3/8)x According to the question  [(5x/8) + 12]/(3x/8) = 13/7 [5x + 96]/3x = 13/7 35x + 672 = 39x 672 = 39x - 35x 672 = 4x x = 168 liter
Which of the following is the justification that aligns text on both margins of a document in Word?
If both the equations I and II given below are added, then find the product of roots of newly formed equation.
I: 3x2 + 9x + 5
...
The ratio between the speed of a bus and train is 15:27 respectively. Also, a car covered a distance of 720 km in 9 hours. The speed of the bus is three...
Two places X and Y are 450 km apart. A truck leaves place X from place Y and at the same time another truck leaves place Y to X. Both the men meet 9 hou...
If x and y are the roots of x2 + x + 3 = 0, then (x11 + y11)/(x-11 + y-11) is equal to:
The main folder on a storage device is known as
If the product of roots of equation x2 - 3(2p+4)x + (p2 - 24p + 145) = 0 is unity, then 'p' can take the values as
A train of length 260 m crosses another train of length 120 m running is opposite direction in 5 sec. If speed of longer train is 90 km/h, then in what ...
The question consists of four statements: I, II, III and IV given below it. You have to decide whether the data given in which of the following statemen...
A and B are the roots of equation x2 - 13x + k = 0. If A - B = 5, what is the value of k?
Relevant for Exams:
