Advertisements
Advertisements
प्रश्न
The interests on two successive years for a sum invested at compound interest compounded annually are Rs 840 and Rs 940.80. Calculate the rate of interest and the sum invested.
Advertisements
उत्तर
For the seoond year:
A=Rs 940.80 ; P=Rs 840 ; n= 1 ; r = ?
`"A" = "P" (1 + "r"/100)^"n"`
940.80 = 840 `(1 + "r"/100)^1`
94080 = 84000 +840 r
840 r = 10080
r = 12
Hence, rate of interest = 12°/o
For the first year:
I= Rs 840 ; r = 12 % ; n = l ; P = ?
`"I" =("P" xx "r" xx "n")/100`
Rs 840 = Rs `("P" xx 12 xx 1)/100`
P = Rs`84000/12`
P = Rs 7000
The sum invested= Rs 7,000
संबंधित प्रश्न
Prashant borrowe Rs. 35000 at 12% p.a. compounded semi-annually. Find the amount he needs to pay back at the end of `1 1/2` years
Pradeep gave Rs.16000 to a friend for 1.5 years at 15% p.a. compounded semi-annually. Find the interest earned by him at the end of 1.5 years.
What sum of money will amount to Rs 16,637.50 in 3 years at 10 % p.a. compound interest?
Ramesh borrowed Rs 12,000 at 15% compound interest for 2 years. At the end of the first year he returned some amount and on paying Rs 9,200 at the end of the second year, he cleared the loan. Calculate the amount of money Ramesh returned at the end of the first year.
Rajan borrowed Rs 32,000 at 12% compound interest for 2 years. At the end of the first year he returned some amount and on paying Rs 17,920 at the end of the second year, he cleared the loan. Calculate the amount Rajan paid at the end of the first year.
Calculate the amount and the compound interest for the following:
Rs 10,000 for 3 years if tl1e rates of interest are 10%, 11% and 12% for the successive years.
On what sum of money will the compound interest for `2 1/2` years at 12% per annum amount to Rs 8,241.60?
On what sum of money will the compound interest for 2 years at 10% p.a. compounded half-yearly amount to Rs 3,448.10?
A sum of money placed at compound interest compounded annually amounts to Rs 26,460 in 2 years and to Rs 29,172.15 in 4 years. Calculate the rate of interest and the sum.
The cost of a machine depreciates by 10% every year. If its present worth is Rs.18,000; what will be its value after three years?
