Question

A sum of rupees 15500 was deposited by arnav in a bank .He deposited an additional rupees 4000 after 3 years . at the end of 10 years , he recieves an ammount of rupees 30480 find the rate of interest.​

Answer 1

Answer:

The rate of interest is 6%

Step-by-step explanation:

Here 'r' reference to the rate of interest

At first total of the 15500 rupees and internet of 10 years of this...

15500 +(15500*r*10)/100 =15500 +1550r......... (i)

Then the total of the 4000 rupees and internet of 7 years of this... (because 4000 rupees deposit in the bank after three years of first deposition)

4000 +(4000*r*7)/100 =4000 +280r......(ii)

According to question

(i) + (ii) =30480

Or, 19500+1830r =30480

Or, 1830r = 10980

Or, r=6

I think it will help you

Answer 2

Answer:

10.980

Step-by-step explanation:

s.i= a - p. a=amount , p=principal

$s.i = \frac{30480 - 19500}{100 \times 10 } \\ = \frac{10980}{100 \times 10} \\ = 10.980$

answers = 10.980