Question
I. x ² – 10x + 21 = 0 II. y ² – 8y + 15 =
0 In the following question two equations numbered I and II are given. You have to solve both the equations and give answers:Solution
x ² – 10x + 21 = 0 x ² – 7x – 3x + 21 = 0 (x-7) × (x-3) X = 7,3 y² – 8y + 15 = 0 y² –5y – 3y + 15 = 0 (y-5) × (y-3) = 0 Y = 5, 3 Comparing the values of x and y we conclude that the value of y lies between the value of x. S0, relation can’t be determined
Total population of city P and Q is 2240 and 2650 respectively. If the ratio of number of males to females in city is P and Q is 4:3 and 3:2 respectivel...
- Five friends ('P', 'Q', 'R', 'S', and 'T') went to a cafe and their bill was Rs. 2,000. 'P' paid 1/4th of what the other four paid combined. 'Q' paid 30% l...
The radii of two cylinders are in the ratio 1 : 4 and their heights are in the ratio 4 : 3.
Their volumes will be in the ratio ______.
Hariom has 85 notes of Rs 50 and Rs 100. If the total money he has is Rs 5000, then find the number of Rs 50 notes.
- The ratio of the number of fiction to non-fiction books in a library is 4:7. If 16 more books of each type are added, the ratio becomes 8:13. Find the numb...
The ratio of males and females in a zoo is 4:5 respectively and the percentage of children among males and the percentage of children among females are ...
A right prism has a square base with side of base 4 cm and the height of prism is 9 cm. The prism is cut in three parts of equal heights by two planes p...
- The ratio of number of men to women in a team is 3:2, respectively. If the number of men were 10 less and the number of women were 15 more, then their numb...
The incomes of two colleagues 'X' and 'Y' are in the ratio 6:11. 'X' spends 70% of his income, while 'Y' spends 72.72% of his income. Find the ratio of ...
A sum of Rs. 2400 was divided among three persons X, Y and Z such that if their shares were diminished by Rs, 5, Rs. 10 and Rs. 15 respectively, the rem...