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
Find the interest and the amount on:
₹ 5,000 at 8% per year from 23rd December 2011 to 29th July 2012.
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.
What sum of money borrowed on 24th May will amount to Rs.10210.20 on 17th October of the same year at 5 percent per annum simple interest.
Anita takes a loan of Rs. 5,000 at 15% per year as the rate of interest. Find the interest she has to pay at the end of one year.
A sum of ₹ 46,900 was lent out at simple interest and at the end of 2 years, the total amount was ₹ 53,466. Find the rate of interest per year
In the first year on an investment of Rs 6,00,000 the loss is 5% and in the second year the gain is 10%, the net result is ______.
Amount received on ₹ 3000 for 2 years at the rate of 11% per annum is ______.
Interest on ₹ 12500 at 18% per annum for a period of 2 years and 4 months is ______.
Chalk contains 10% calcium, 3% carbon and 12% oxygen. Find the amount of carbon and calcium (in grams) in `2 1/2` kg of chalk.
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.
