Question

A sum when reckoned at 15/2% per annum amounts to Rs 3920 in 3 years. find the sum

Answer 1

A= 3920
T=3
R=15/2%
Let the P be 100
(100X3X15) /(100X2)= 22.5
A=(100+22.5)=122.5
If A=122.5, P=100
If A=3920, P=(100/122.5)X 3920
=3200
The principal is 3200