Advertisements
Advertisements
प्रश्न
₹ 9000 becomes ₹ 18000 at simple interest in 8 years. Find the rate per cent per annum.
उत्तर
Given, P = ₹ 9000, A = ₹ 18000 and T = 8 yr
As we know, A = P + I
⇒ I = A – P = 18000 – 9000
⇒ I = ₹ 9000
Now, I = `(P xx R xx T)/100`
⇒ R = `(I xx 100)/(P xx T) = (9000 xx 100)/(9000 xx 8)`
∴ R = 12.5%
Hence, the rate of interest per annum is 12.5%.
APPEARS IN
संबंधित प्रश्न
If Meena gives an interest of ₹ 45 for one year at 9% rate p.a.. What is the sum she has borrowed?
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
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?
Basha borrowed ₹ 8,500 from a bank at a particular rate of simple interest. After 3 years, he paid ₹ 11,050 to settle his debt. At what rate of interest he borrowed the money?
Rajni and Mohini deposited ₹ 3000 and ₹ 4000 in a company at the rate of 10% per annum for 3 years and `2 1/2` years respectively. The difference of the amounts received by them will be ______.
The ______ of interest on a sum of ₹ 2000 at the rate of 6% per annum for `1 1/2` years and 2 years is ₹ 420.
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.
What sum of money lent out at 16 per cent per annum simple interest would produce ₹ 9600 as interest in 2 years?
Divide ₹ 10000 in two parts so that the simple interest on the first part for 4 years at 12 per cent per annum may be equal to the simple interest on the second part for 4.5 years at 16 per cent per annum.
In how many years will the simple interest on a certain sum be 4.05 times the principal at 13.5 per cent per annum?
