Question
I. 15y2Β + 4y β 4 = 0 II.
15x2Β + x β 6 = 0 In the following questions, two equations numbered I and II are given. You have to solve both the equations and give answer.Solution
I. 15y2 + 4y β 4 = 0 15y2 + 10y β 6 y β 4 = 0Β Β 5y(3y + 2) β 2 (3 y + 2) = 0 (5 y β 2) (3 y + 2) = 0 y = 2/5, -2/3 II. 15x2 + x β 6 = 0 15x2 β 9 x + 10x β 6 = 0 3 x(5 x β 3) + 2 (5 x β 3) = 0 (3 x + 2) (5 x β 3) = 0 x = - 2/3, 3/5 Hence, x β₯ y
Present age of 'B' is five times more than the age of his brother. If two years ago, their ages were in ratio 10:1, respectively, then find the present...
The present age ratio of X to Y's age five years ago is 7:9. Ten years from now, the combined ages of Y and Z will total 115 year...
Present ages of P and Q are in the ratio 4:7 respectively. If Qβs age, 15 years hence from now will be 6 times of Pβs age, 6 years ago from now, the...
The sum of the present ages of a mother and her daughter is 52 years. Four years ago, the mother was three times as old as her daughter. What is the dau...
In a family of four, the average age of Anu, Ben, Carla, and Dan is 28 years. The ratio of Carla's to Eva's present ages is 5:6, and Ben's age is 20% le...
Five years ago from now, ratio of ages of Sohan and Mohan was 3:5, respectively. If 5 years hence from now, ratio of their ages will be 7:10, then find ...
Sum of the present ages of A, B, C and D is 40 years. After 6 years ratio of their ages is 6:5:3:2. What is Cβs present age?
The current average age of students in a class is 24 years. What will the average age of the students be in 6 years?
The current average age of Aman and Bhanu is 27 years, and the ratio of Bhanu's present age to Chetna's present age is 10:11. If Aman's current age is 2...
The age of person A (y+3) years ago and the age of person B (y+4) years from now are in the ratio 2:3.
It is also given th...