A Sum was put a compound Interest amounted to Rs. 650 after 3rd years and Amounted to 676 after 6th years. Find the Principle ?
a) 615 b) 632 c) 628 d) 630 e) 625
Answers and Explanations are welcome in comments.
The Correct Answer will be Given Tomorrow.
Correct Answer is 625
ReplyDeleteExplanation : There is no need to find out the Rate of Interest
Just Proportionate both values
Let x as Principle
If x principle amounted to 650 in 3 years and same principle amounted to 676 in 6 years
So, (x/650) and (x/676), So we have to equal them bt (x/676) is after 6 years and (x/650) is after 3 years. We have equal them by equaling their years to square the other side (x/650)
(x/650)^2=(x/676). Solve it and you will find 625 Principle