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प्रश्न
A man has a Recurring Deposit Account in a bank for `3 1/2` years. If the rate of interest is 12% per annum and the man gets Rs. 10,206 on maturity, find the value of monthly instalments.
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उत्तर
Let instalment per month (P) = Rs. y
Number of months (n) = 42
Rate of interest (r) = 12% p.a.
∴ `S.I. = P xx (n(n + 1))/(2 xx 12) xx r/100`
= `y xx (42(42 + 1))/(2 xx 12) xx 12/100`
= `y xx 1806/24 xx 12/100`
= Rs. 9.03y
Maturity value = Rs. (y × 42) + Rs. 9.03y = Rs. 51.03y
Given maturity value = Rs. 10,206
Then Rs. 51.03y = Rs. 10206
`\implies` y = `10206/51.03` = Rs. 200
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A page from the ‘Savings Bank’ account of Priyanka is given below:
| Date | Particulars |
Amount (Rs.) |
Amount deposited (Rs.) |
Balance (Rs.) |
| 03/04/2006 | B/F | 4000.00 | ||
| 05/04/2006 | By cash | 2000.00 | 6000.00 | |
| 18/04/2006 | By cheque | 6000.00 | 12000.00 | |
| 25/05/2006 | By cheque | 5000.00 | 7000.00 | |
| 30/05/2006 | By cash | 3000.00 | 10000.00 | |
| 20/07/2006 | By self | 4000.00 | 6000.00 | |
| 10/09/2006 | By cash | 2000.00 | 8000.00 | |
| 19/09/2006 | To cheque | 1000.00 | 7000.00 |
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