Question

a certain sum of money at a certain rate became 2100 in 2years and Rs. 2250 in 5years. find the rate of interest

Answer 1

let principal be p
interest = prt /100
= pr2/100 =2100-p
r = (105000-50p) /p



interest = prt/100 = 5pr =2250-p
= 5p(105000-50p)/p =2250-p
= 250(2100-p)=2250-p
=525000-250p =2250-p
= 249p= 522750
p= 2099.39
p=2100