Aptitude - Simple Interest
Overview Exercise "It takes a very long time to become young."
- Pablo Picasso
11.
A sum of money amounts to Rs. 9800 after 5 years and Rs. 12005 after 8 years at the same rate of simple interest. The rate of interest per annum is:
Answer: B
Explanation:
S.I. for 3 years = Rs. (12005 - 9800) = Rs. 2205.
S.I. for 5 years = Rs.
2205
x 5
= Rs. 3675
3
Hence, rate =
100 x 3675
= 12%
6125 x 5
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 E. None of these
Answer: B
Explanation:
Let the principal be P and rate of interest be R%.
P x R x 6
100
=
6PR
=
6
= 2 : 3.
P x R x 9
100
9PR
9
13.
A certain amount earns simple interest of Rs. 1750 after 7 years. Had the interest been 2% more, how much more interest would it have earned?
A. Rs. 35 B. Rs. 245 C. Rs. 350 D. Cannot be determined E. None of these
Answer: B
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.
14.
A person borrows Rs. 5000 for 2 years at 4% p.a. simple interest. He immediately lends it to another person at 6
A. Rs. 112.50 B. Rs. 125 C. Rs. 150 D. Rs. 167.50
Principal = Rs. (9800 - 3675) = Rs. 6125.
p.a for 2 years. Find his gain in the transaction per year.
