00:01
So we are told that 8 ,000 rupees goes to 9 ,200 rupees in one year.
00:07
I want to find the interest rate.
00:10
So the formula is a equals, a is the end amount, p starting amount, 1 plus r power of t.
00:22
Or r is the interest rate in decimal form and t number of years.
00:28
Well, here i have 9 ,200, equals.
00:32
8 ,000 1 plus r power of 1 during one year so what we have then is 9200 over 8 ,000 is 1 plus r so 9200 divided by 8 ,000 is 1 .15 equals 1 plus r so r then is 0 .15 equals 1 plus r so r then is 0 0 .15 or 15%.
01:12
And that's the first one, 15 % interest per a year, compounding annually.
01:20
Now, number two is the interest accrued in the second year.
01:25
So what we have then is 15 % of the amount you had at the end of the first year, which was 9 ,200.
01:44
It's compounding.
01:48
So that will be, 0 .5%.
01:49
0 .15 times 9 ,200.
01:54
So 0 .15 times 9 ,200 is 1380 for the interest.
02:06
Rupees...