[Jail Warder S-4 2021 ]
6. Sonia invested a certain sum of money at 12% p.a. simple interest for 'n' years. At the end of 'n' years, Sonia got back 7 times his original investment. What is the value of n ?
58.33 Years
60 Years
50 Years
52.67 Years
7. A hospital uses a mixture of A and B. Mixture A consists of salt and water at Rs. 7.62/litre and contains 5% salt. Mixture B contains 75% water and costs Rs. 7.82/litre. How much does the patient pay if he buys 15 litres of mixture containing 18% salt?
116.25
118.50
114.50
117.25
8. A earns 40% more than B. C earns 70% more than B. How much is the salary earned by C more than that earned by A?
30
21.42
17.64
75
9. The sum of two number is 363 and their difference is 1. Find their product.
32678
32982
32462
32942
10. The ratio of Meera's age 4 years ago and Varsha's age after 4 years is 1:1. Presently, the ratio of their ages is 5:3. Find the ratio between Meera's age 4 years from now and Varsha's age 4 years ago.
2:1
3:2
3:1
2:3