A mobile phone is available for Rs. 25,000 or Rs. 5,200 down payment, followed by 4 equal monthly instalments. If the rate of interest is 25% p.a. simple interest, calculate the amount of each instalment.
A. Rs. 5,020
B. Rs. 4,950
C. Rs. 5,362
D. Rs. 5,200
Answer: Option D
Solution(By Examveda Team)
$$\eqalign{ & {\text{Cash payment}} = 25000 \cr & {\text{Down payment}} = 5200 \cr & {\text{Remaining}} = 19800 \cr & {\text{Installment}}\left( x \right) = 4 \cr} $$\[\begin{array}{*{20}{c}} \Rightarrow &{19800}&{ - x} \\ {}&{19800}&{ - 2x} \\ {}&{\mathop {19800}\limits_{\_\_\_\_\_\_\_\_\_\_\_} }&{\mathop { - 3x}\limits_{\_\_\_\_\_\_\_\_\_} } \\ {}&{79200}&{ - 6x} \end{array}\]
$$\eqalign{ & \Rightarrow {\text{Interest}} = 4x - 19800 \cr & \Rightarrow \frac{{\left( {79200 - 6x} \right) \times 25}}{{12 \times 100}} = 4x - 19800 \cr & \Rightarrow 1920x - 50400 = 79200 - 60x \cr & \Rightarrow 1980x = 1029600 \cr & \Rightarrow x = 5200 \cr} $$
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
Join The Discussion