Advertisements
Advertisements
प्रश्न
Arun lent ₹ 5,000 to Balaji for 2 years and ₹ 3,000 to Charles for 4 years on simple interest at the same rate of interest and received ₹ 2,200 in all from both of them as interest. Find the rate of interest per year
Advertisements
उत्तर
Principal lent to Balaji P1 = ₹ 5000
Time n1 = 2 years
Let r be the rate of interest per year
Simple interest got from Balaji = `"Pnr"/100`
⇒ I1 = `(5000 xx 2 xx "r")/100`
Again principal let to Charles P2 = ₹ 3000
Time (n2) = 4 years
Simple interest got from Charles (I2) = `(3000 xx 4 xx "r")/100`
Altogether Arun got ₹ 2200 as interest.
∴ I1 + I2 = 2200
`(5000 xx 2 xx "r")/100 + (3000 xx 4 xx "r")/100` = 2200
100r + 120r = 2200
220r = 2200
r = `2200/220`
r = 10%
Rate of interest per year = 10%
APPEARS IN
संबंधित प्रश्न
John lent Rs. 2550 to Mohan at 7.5 percent per annum. If Mohan discharges the debt after 8 months by giving an old black and white television and Rs. 1422.50; find the price of the television.
Sandeepbhau borrowed 120000 rupees from a bank for 4 years at the rate of `8 1/2` p.c.p.a. for his son’s education. What is the total amount he returned to the bank at the end of that period?
In what time will ₹ 17800 amount to ₹ 19936 at 6% per annum?
The interest for a principle of ₹ 4,500 which gives an amount of ₹ 5,000 at end of certain period is
Amount received on ₹ 3000 for 2 years at the rate of 11% per annum is ______.
Interest on ₹ 1200 for `1 1/2` years at the rate of 15% per annum is ₹ 180.
₹ 6400 were lent to Feroz and Rashmi at 15% per annum for `3 1/2` and 5 years respectively. The difference in the interest paid by them is ₹ 150.
Radhika borrowed ₹ 12000 from her friends. Out of which ₹ 4000 were borrowed at 18% and the remaining at 15% rate of interest per annum. What is the total interest after 3 years?
Dhruvika invested money for a period from May 2006 to April 2008 at rate of 12% per annum. If interest received by her is ₹ 1620, find the money invested.
A memorial trust donates ₹ 5,00,000 to a school, the interest on which is to be used for awarding 3 scholarships to students obtaining first three positions in the school examination every year. If the donation earns an interest of 12 per cent per annum and the values of the second and third scholarships are ₹ 20,000 and ₹ 15,000 respectively, find out the value of the first scholarship.
