The simple interest on a sum of money is $$\frac{1}{4}$$ of the principal and the number of years is equal to rate percent per annum. The rate percent is = ?
A. 2.5%
B. 5%
C. 7.5%
D. 10%
Answer: Option B
Solution(By Examveda Team)
$$\eqalign{ & {\text{Principal}}\,\,\,\,\,{\text{Interest}} \cr & \underbrace {\,\,\,\,\,\,\,4{\text{P}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\text{P}}\,\,\,\,\,\,\,\,\,\,}_{} \cr & {\text{Time = Rate }}\% {\text{ (given)}} \cr & {\text{Now by using formula , }} \cr & {\text{P = }}\frac{{4{\text{P}} \times {\text{R}} \times {\text{R}}}}{{100}} \cr & \Rightarrow {{\text{R}}^2} = \frac{{100}}{4} \cr & \Rightarrow {\text{R = }}\frac{{10}}{2} \cr & \Rightarrow {\text{R = 5}}\% \cr} $$Related Questions on Interest
Find the simple interest on Rs. 5200 for 2 years at 6% per annum.
A. Rs. 450
B. Rs. 524
C. Rs. 600
D. Rs. 624
Rs. 1200 is lent out at 5% per annum simple interest for 3 years. Find the amount after 3 years.
A. Rs. 1380
B. Rs. 1290
C. Rs. 1470
D. Rs.1200
E. Rs. 1240
Interest obtained on a sum of Rs. 5000 for 3 years is Rs. 1500. Find the rate percent.
A. 8%
B. 9%
C. 10%
D. 11%
E. 12%
Rs. 2100 is lent at compound interest of 5% per annum for 2 years. Find the amount after two years.
A. Rs. 2300
B. Rs. 2315.25
C. Rs. 2310
D. Rs. 2320
E. None of these
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