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  • The interest on a certain sum lent at compound interest, the interest being compounded annually, in the 2nd year is Rs.1200. The interest on it in the 3rd year is Rs 1440. Find the rate of interest

The interest on a certain sum lent at compound interest, the interest being compounded annually, in the 2nd year is Rs.1200. The interest on it in the 3rd year is Rs 1440. Find the rate of interest per annum.

 

Option: 1

10%


Option: 2

15%


Option: 3

20%


Option: 4

 25% 

 


Answers (1)

best_answer

Interest of 2nd year = 1200

Interest of 3rd year = 1440 

Difference = 240 

In compound interest, interest in next year is calculated on previous year 

So, = 240 / 1200 x 100 = 20 % 

Increase in next year interest is what percent of the interest of previous year is = to the rate of interest

 

Posted by

shivangi.shekhar

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