Direction
11.

A sum of money amounts to 9800 after 5 years and 12005 after 8 years at the same rate of simple interest. The rate of interest per annum is:


A. 5% B. 8%
C. 12% D. 15%
Answer and Explanation
Answer: Option C
Explanation: S.I. for 3 years = (12005 - 9800) = 2205.

S.I. for 5 years = (2205/3)x 5 = 3675

Principal = (9800 - 3675) = 6125.

Hence, rate = (100 x 3675)/(6125x5)% = 12%

12.

What will be the ratio of simple interest earned by certain amount at the same rate of interest for 6 years and that for 9 years?

A. 1 : 3 B. 1 : 4
C. 2 : 3 D. Data inadequate
Answer and Explanation
Answer: Option C
Explanation: Simple Interest Questions and Answers
13.

A certain amount earns simple interest of 1750 after 7 years. Had the interest been 2% more, how much more interest would it have earned?
A. 35 B. 245
C. 350 D. Cannot be determined
Answer and Explanation
Answer: Option D
Explanation: We need to know the S.I., principal and time to find the rate.

Since the principal is not given, so data is inadequate.