Present ages of Radha and Sudha are in the ratio of 7 : 9 respectively. Five years ago ratio of their ages that time was 3 : 4. What will be Sudha?s age after 3 years from now ?
1). 48 years
2). 42 years
3). 43 years
4). 38 years
Let the present ages of Radha and Sudha be R and S respectively.
Hence, R:S = 7:9 and (R-5):(S-5)=3:4
So, 9R = 7S and 4R-20 = 3S-15 or 4R = 3S+5
From the first equation, 36R=28S and from the second equation, 36R = 27S+45
Therefore, 28S = 27S+45 or S=45
So, Sudha's age three years from now will be 48 years old.
Let the present ages of Radha and Sudha be R and S respectively.
Hence, R:S = 7:9 and (R-5):(S-5)=3:4
So, 9R = 7S and 4R-20 = 3S-15 or 4R = 3S+5
From the first equation, 36R=28S and from the second equation, 36R = 27S+45
Therefore, 28S = 27S+45 or S=45
So, Sudha's age three years from now will be 48 years old.
6. What should come in place of question mark (?) in the following number series ?
7. Which of the following is billionth of a second ?
9. What is the value of (x) in the following equation ?$$\frac{x^{0\cdot7}}{36}=\frac{9}{x^{1.3}}$$
10. ?Article 14? of the Indian constitution deals with the__________?