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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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| January 1st 2006 | B/F | - | - | 1,270 |
| January 7th 2006 | By Cheque | - | 2,310 | 3,580 |
| March 9th 2006 | To self | 2,000 | - | 1,580 |
| March 26th 2006 | By cash | - | 6,200 | 7,780 |
| June 10th 2006 | To Cheque | 4,500 | - | 3,280 |
| July 15th 2006 | By clearing | - | 2,630 | 5,910 |
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