Zimbobwe was formerly known as
Zimbobwe was formerly known as
Zimbobwe was formerly known as
Simple interest on a certain sum at a certain annual rate of interest is 16% of the sum. If the numbers representing rate percent and time in years be equal, then the rate of interest is
upendra ? undefined
Correct answer is: \(\text{4%}\)
Explanation:
Simple interest on a certain sum at a certain annual rate of interest is 16% of the sum. If the numbers representing rate percent and time in years be equal, then the rate of interest is:
\(\text{Given: Simple interest } (SI) = 16\% \text{ of the sum} \)
\(SI = \frac{P \times R \times T}{100} \)
\(\frac{16P}{100} = \frac{P \times R \times R}{100} \)
\(16 = R^2\)
\(R = \sqrt{16}\)
\(R = 4\)
A sum of money at simple interest amounts to Rs. 14,160 in 3 years. If the rate of interest is increased to 25%, the same sum amounts to Rs. 14,700 in the same time. The rate of interest is
upendra ? undefined
Correct answer is: 6%
Explanation:\(\Large P+\frac{Pr \times 3}{100} = 14160\)
\(\Large P + P \times \frac{5r}{400} \times 3 = 14700\)
\(\left[ Rate\ of\ Int. = r + \frac{25}{100} r \right]\)
(By Ii) and (ii)
\(\Large P + \frac{5}{4} \left(14160-P\right)\)
\(=> 4P + 70800 - 5P = 58800\)
\(=> P = 70800 - 58800 - 12000\)
\(\text{Therefore, From equation (i),}\)
\(\Large 12000+\frac{12000 \times r \times 3}{100}\)
\(\Large 120 \times 3 \times r = 14160 - 12000 = 2160\)
\(=> \Large r = \frac{2160}{120 \times 3}\)
\(r = 6 \text{%}\)
Veena obtained an amount of Rs. 8,376 as simple interest on a certain amount at 8 p.c.p.a. after 6 years. What is the amount invested by Veena ?
upendra ? undefined
Correct answer is: Rs. 17,450
Explanation:
\(\eqalign{ & {\text{S}}{\text{.I}}{\text{.}} = {\text{Rs}}{\text{.8376}} \cr & {\text{R}} = 8\% \cr & {\text{T}} = {\text{6}}\,{\text{years}}. \cr & \therefore {\text{Sum}} = \cr & {\text{Rs}}{\text{.}}\left( {\frac{{100 \times 8376}}{{8 \times 6}}} \right) \cr & = {\text{Rs}}{\text{. }}17450 \cr}\)
A certain amount earns simple interest of Rs. 1,750/- after 7 years. Had the interest been 2% more, how much more interest would it have earned ?
upendra ? undefined
Correct answer is: Cannot be determined
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.