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प्रश्न
Each of A and B both opened a recurring deposit accounts in a bank. If A deposited Rs. 1,200 per month for 3 years and B deposited Rs. 1,500 per month for 2 ½ years; find, on maturity, who will get more amount and by how much? The rate of interest paid by the bank is 10% per annum.
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उत्तर
For A
Installment per month (P) = Rs. 1,200
Number of months (n) = 36
Rate of interest (r) = 10% p.a.
∴ `S.I. = P xx (n(n + 1))/(2 xx 12) xx r/100`
= `1200 xx (36(36 + 1))/(2 xx 12) xx 10/100`
= `1200 xx 1332/24 xx 10/100`
= Rs. 6,660
The amount that A will get at the time of maturity
= Rs. (1,200 × 36) + Rs. 6,660
= Rs. 43,200 + Rs. 6,660
= Rs. 49,860
For B
Instalment per month (P) = Rs. 1,500
Number of months (n) = 30
Rate of interest (r) = 10% p.a.
∴ `S.I. = P xx (n(n + 1))/(2 xx 12) xx r/100`
= `1500 xx (30(30 + 1))/(2 xx 12) xx 10/100`
= `1500 xx 930/24 xx 10/100`
= Rs. 5,812.50
The amount that B will get at the time of maturity
= Rs. (1,500 × 30) + Rs. 5,812.50
= Rs. 45,000 + Rs. 5,812.50
= Rs. 50,812.50
Difference between both amounts = Rs. 50,812.50 – Rs. 49,860
= Rs. 952.50
Then B will get more money than A by Rs. 952.50
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संबंधित प्रश्न
Virat opened a Savings Bank account in a bank on 16th April 2010. His pass book shows the following entries:
| Date | Particulars |
Withdrawal (Rs.) |
Deposit (Rs.) | Balance (Rs.) |
| April 16, 2010 | , By cash | - | 2500 | 2500 |
| April 28th | By cheque | - | 3000 | 5500 |
| May 9th | To cheque | 850 | - | 4650 |
| May 15th | By cash | 1600 | 6250 | |
| May 24th | To cash | 1000 | - | 5250 |
| June 4th | To cash | 500 | - | 4750 |
| June 30th | To cheque | - | 2400 | 7150 |
| July 3rd | By cash | - | 1800 | 8950 |
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1) the total interest earned by Mr Gupta.
2) the rate of interest per annum.
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At a certain rate of interest, the interest after 4 years on 5000 rupees principal is 1200 rupees. What would be the interest of 15000 rupees at the same rate of interest for the same period?
Javed deposited 12000 rupees at 9 p.c.p.a. in a bank for some years, and withdrew his interest every year. At the end of the period, he had received altogether 17,400 rupees. For how many years had he deposited his money?
Fill in the blanks in the table.
| Principal | Rate of interest (p.c.p.a.) | Time | Interest | Amount |
| ...... | 6% | 4 years | 1200 | ...... |
