4r = 100
⇒ r = 25%
Rate of interest r = 25%
Advertisements
Advertisements
प्रश्न
If a principal is getting doubled after 4 years, then calculate the rate of interest. (Hint: Let P = ₹ 100)
योग
Advertisements
उत्तर
Let the principal P = ₹ 100
Given it is doubled after 4 years
i.e. Time n = 4 years
After 4 years A = ₹ 200
∴ A = P + I
A – P = I
200 – 100 = I
After 4 years interest I = 100
I = `"Pnr"/100`
⇒ 100 = `(100 xx 4 xx "r")/100`
shaalaa.com
क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
APPEARS IN
संबंधित प्रश्न
The simple interest on a certain sum of money is `3/8` of the sum in `6 1/4` years. Find the rate percent charged.
Ashok lent out Rs.7000 at 6% and Rs.9500 at 5%. Find his total income from the interest in 3 years.
If ₹ 3,750 amount to ₹ 4,620 in 3 years at simple interest. Find:
(i) the rate of interest
(ii) the amount of Rs. 7,500 in `5 1/2` years at the same rate of interest
A sum of money, lent out at simple interest, doubles itself in 8 years. Find :
(i) the rate of interest
(ii) in how many years will the sum become triple (three times) of itself at the same rate percent?
Angela deposited 15000 rupees in a bank at a rate of 9 p.c.p.a. She got simple interest amounting to 5400 rupees. For how many years had she deposited the amount?
Vinita deposited Rs. 15000 in a bank for one year at an interest rate of 7 p.c. p.a. How much interest will she get at the end of the year?
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 ₹ 16,500 amount to ₹ 22,935 at 13% per annum?
Given the principal = Rs 40,000, rate of interest = 8% p.a. compounded annually. Find amount if period is 2 years.
₹ 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.
