At what rate percent compound interest per annum will Rs. 640 amount to Rs. 774.40 in 2 years?
Given,
Principal = Rs.640
Amount = Rs.774.40
Time = 2 years
Let rate = R%
So,
A = 
= 
= 
= 
= 
= 
Hence,
Rate = 10% per annum
12
At what rate percent compound interest per annum will Rs. 640 amount to Rs. 774.40 in 2 years?
Given,
Principal = Rs.640
Amount = Rs.774.40
Time = 2 years
Let rate = R%
So,
A =
=
=
=
=
=
Hence,
Rate = 10% per annum