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Question
Rekha opened a recurring deposit account for 20 months. The rate of interest is 9% per annum and Rekha receives Rs. 441 as interest at the time of maturity. Find the amount Rekha deposited each month.
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Solution
Let the monthly installment i.e P = Rs. x.
Since n = 20 months and r = 9%
∴ Interest `= P xx (n(n + 1))/(2 xx 12) xx r/100`
= `(x xx 20(21))/(2 xx 12) xx 9/100`
= `(x xx 20 xx 21)/(2 xx 12) xx 9/100`
= `(x xx 5 xx 7 xx 9)/(2 xx 100)`
Interest = 1.575 × P
Interest = 441 {Given}
⇒ 1.575x = 441
⇒ x = 280 Rs.
RELATED QUESTIONS
Kiran deposited Rs. 200 per month for 36 months in a bank’s recurring deposit account. If the bank pays interest at the rate of 11% per annum, find the amount she gets on maturity.
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Calculate the interest the accrured upto 31st December, 2007: if the rate of interest is 5% compounded yearly and the principle for every month is taken as the nearest multiple of Rs.10.
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Given below is a page from the passbook of the savings bank account of Mr. Rajesh. Complete the entries in the passbook and calculate the interest paid to him by the bank at 6°/o pa in the end of June.
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| 08.02.2008 | By Cash | 12000.00 | ||
| 15.03.2008 | To cash | 3000.00 | ||
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| 06.06.2007 | By Cash | 1725.00 | 14225.00 | |
| 08.09.2007 | By Cheque | 375.00 | 14600.00 | |
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(b) Find the maturity amount.
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Calculate the interest due to Mrs. Bhalla for the period from January 2004 to December 2004, at the rate of 5% per annum.
| Date Year 2004 |
Particulars | Amount (₹) Withdrawals |
Amount (₹)Deposits |
Balance (₹) |
| January 1 | B/F | - | - | 2,000.00 |
| January 9 | By cash | - | 200.00 | 2,200.00 |
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| July 29 | To cheque | 200.00 | - | 1,800.00 |
| November 7 | By cash | - | 300.00 | 2,100.00 |
| December 8 | By cash | - | 200.00 | 2,300.00 |
In a recurring deposit account, Mohit deposited ₹ 5,000 per month for one year and at maturity gets ₹ 67,500; the total interest earned is ______.
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