a certain sum of money invested at the rate of 5%per annum compoud interest,the interest compounded annually.if the difference between the interests of third year and first is RS102.50.find the sum.

 

 

Asked by Chakraborty | 26th Jan, 2018, 09:07: PM

Expert Answer:

begin mathsize 16px style Let space straight P space be space the space sum space invested.
straight r equals 5 percent sign space straight p. straight a.
Difference space between space interest space of space third space year space and space first space year space is space Rs. space 102.50.
Interest space for space thirs space year minus space interest space for space first space year equals 102.50
straight P open parentheses 1 plus 5 over 100 close parentheses cubed minus straight P minus open square brackets straight P cross times open parentheses 1 plus 5 over 100 close parentheses minus straight P close square brackets equals 102.50
straight P open parentheses 1 plus 5 over 100 close parentheses cubed minus straight P cross times open parentheses 1 plus 5 over 100 close parentheses equals 102.50
straight P equals Rs. space 952.38 end style

Answered by Sneha shidid | 29th Jan, 2018, 10:22: AM