Advertisements
Advertisements
Question
Rajiv Bhardwaj has a recurring deposit account in a bank of Rs 600 per month. If the bank pays simple interest of 7% p.a. and he gets Rs 15450 as maturity amount, find the total time for which the account was held.
Advertisements
Solution
Deposit during the month (P) = Rs 600
Rate of interest = 7% p.a.
Amount of maturity = Rs 15450
Let time = n months
∴ Total principal
= `("P"("n")("n" + 1))/(2)`
= `(600 xx "n"("n" + 1))/(2)`
= `(600("n"^2 + "n"))/(2)`
= 300(n2 + n)
∴ Interest
= `"PRT"/(100)`
= `(300("n"^2 + "n") xx 7 xx 1)/(100 xx 12)`
= `(7)/(4)("n"^2 + "n")`
∴ `600"n" + (7)/(4)("n"^2 + "n")` = 15450
⇒ 2400n + 7n2 + 7n = 61800
⇒ 7n2 + 2407n - 61800 = 0
⇒ 7n2 - 168n + 2575n - 61800 = 0
⇒ 7n(n - 24) + 2575(n - 24) = 0
⇒ (n - 24) (7n + 2575) = 0
Either n - 24 = 0, then n = 24
or
7n + 2575 = 0, then
7n = -2575
⇒ n = `(-2575)/(7)`
Which is not possible being negative.
∴ n = 24
∴ Period = 24 months or 2 years.
APPEARS IN
RELATED QUESTIONS
Manish opens a Recurring Deposit Account with the Bank of Rajasthan and deposits Rs. 600 per month for 20 months. Calculate the maturity value of this account, if the bank pays interest at the rate of 10% per annum.
A page from the savings bank account of Mr. Prateek if given below.
| Date | Particulars | Withdrawals (In Rs) | Deposits (In Rs) | Balance (In Rs) |
| 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 |
| October 18th 2006 | To Cheque | 530 | - | 5,380 |
| October 27th 2006 | To self | 2,690 | - | 2,690 |
| November 3rd 2006 | By cash | - | 1,500 | 4,190 |
| December 6th 2006 | To cheque | 950 | - | 3,240 |
| December 23rd 2006 | By Transfer | - | 2,920 | 6,160 |
If h receives Rs. 198 as interest on 1st January, 2007, Find the rate of interest paid by the bank.
A page from the passbook of Mr. Rohit is given below. The interest accrued for the period January to December 2006 at a certain rate of interest per annum is Rs. 377.40. without taking the principal as the nearest multiple of Rs. 10, calculate the rate:
| Date | Particulars | Debit (Rs) | Credit (Rs) | Balance (Rs) |
| 2006 | ||||
| Jan 1 | Balance B/F | 7,500.00 | ||
| March 7 | By Cheque | 1,875.00 | ||
| March 10 | By Cash | 625.00 | ||
| July 17 | To self | 3,250.00 | ||
| Oct 5 | By Cheque | 2,160.00 | ||
| Dec 19 | To Cheque | 1,340.00 |
Mr. Punjwanis saving account passbook had the following entries, The bank pays interest at 4.5°/o on all SB accounts. Find the amount received by Mr. Punjwani when he closed the acoount on 2S'h July 08.
| Date | Particulars | Withdrawls | Deposits | Balance |
| 05.01.2008 | By B/F | 24650.00 | ||
| 09.01.2008 | By cash | 14390.00 | 39040.00 | |
| 15.02.2008 | To Cheque | 7600.00 | 31440.00 | |
| 21.02.2008 | By Cheque | 8350.00 | 39790.00 | |
| 07.03.2008 | To Cash | 4000.00 | 35790.00 | |
| 31.03.2008 | By Interest | |||
| 08.04.2008 | By Cheque | 13670.00 | ||
| 12.04.2008 | To Cash | 6000.00 | ||
| 01.05.200 | By Cheque | 17350.00 | ||
| 16.06.2008 | By Cash | 9000.00 | ||
| 27.06.2008 | To Cash | 4370.00 | ||
| 04.07.2008 | By Cheque | 21320.00 | ||
| 11.07.2008 | To Cheque | 9460.00 | c |
Mrs. Chhabra deposits Rs 500 per month in a recurring deposit account for 4 years at a simple interest rate of 6% pa.
(a) Find the maturity value of deposit.
(b) Find the total interest she will earn after 2 years
Naseem has a 5 years Recurring Deposit account in Punjab National Bank and deposit? Rs. 240 per month. If she receives Rs. 17,694 at the time of maturity find the rate of interest.
The entries in the passbook of a Saving Bank Account holder are as follows:
| Date | Particulars | Withdrawals(₹) | Deposits(₹) | Balance(₹) |
| Feb. 12, 1986 | By cash | - | 2,000·00 | 2,000·00 |
| March 10 | By cash | - | 1,100·00 | 3,100·00 |
| April 20 | To cheque no. 231 | 800·00 | - | 2,300·00 |
| April 25 | By cash | - | 700·00 | 3,000·00 |
| May 11 | To cheque no. 232 | 700·00 | - | 2,300·00 |
| July 2 | By cash | - | 400·00 | 2,700·00 |
| July 8 | By cash | - | 500·00 | 3,200·00 |
| Aug. 10 | By cash | - | 600·00 | 3,800·00 |
| Aug. 28 | To cheque no. 233 | 200·00 | - | 3,600·00 |
Rate of interest is 5% per annum. Calculate the interest due if the account is closed on:
(i) September 29, 1986
(ii) October 1, 1986.
Mrs. Goswami deposits Rs. 1000 every month in a recurring deposit account for 3 years at 8% interest per annum. Find the matured value. (2009)
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.
A certain money is deposited in a recurring deposit account for 15 months. If the interest earned for this deposit is one-fifth of the monthly instalment; the rate of interest is ______.
