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प्रश्न
Haneef has a cumulative bank account and deposits Rs. 600 per month for a period of 4 years. If he gets Rs. 5880 as interest at the time of maturity, find the rate of interest.
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उत्तर
Interest = Rs. 58800
Monthly deposit (P) = Rs. 600
Period (n) = 4years or 48months
∴ Deposit for 1month
= `("P"("n")("n" +1))/(2)`
= `(600 xx 48 xx 49)/(2)`
= Rs. 705600
Let, rate of interest = r % p.a.
Interest
= `"Prt"/(100)`
⇒ 5880 = `(705600 xx "r" xx 1)/(100 xx 12)`
5880 = 588r
∴ r = `(5880)/(588)` = 10
∴ Rate of interest = 10% p.a.
संबंधित प्रश्न
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| Jan 9, 2008 | By Cash | - | 10000 | 10000 |
| Feb 12, 2008 | By Cash | - | 15500 | 25500 |
| April 6, 2008 | To Cheque | 3500 | - | 22000 |
| April 30, 2008 | To Self | 2000 | - | 20000 |
| July 16, 2008 | By Cheque | - | 6500 | 26500 |
| August 4, 2008 | To Self | 5500 | - | 21000 |
| August 20, 2008 | To Cheque | 1200 | - | 19800 |
| Dec. 12, 2008 | By Cash | - | 1700 | 21500 |
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