Question

a sum of money is accumulating at compound interest at a certain rate of interest. if simple interest instead of compound were reckoned the interest for the first two year would be diminished by 20 rupees and that for the first three year by 61. find the sum​

Answer 1

Answer:

njhh u have a good day at work Hlo sir I am try to do fast

Answer 2

Answer:

Let the principal be P and rate of interest be r %. Then, principal (i) when difference between C.I. and S.I is for 2 yr) is given by

P = 20×(100)2r2

(ii) When difference between CI & SI in for 3 yrs in given by

P = 61×(10)6r2(300+r)

From eqs. (i) and (ii),

20×104r2 = 61×108r2(300+r)

=> r = 305 - 300 = 5 %

From eq.(i), P = 20×10425

= Rs.8000

please follow me

Mark as brainliest answer