Question

if rs.640 amounts to rs.768 in 2years 3month. what will rs.850 amount to in 3 years at the same rate percent per annum

Answer 1

Si=768-640=128
Time period =5/2 year
So si for 1 year =128x2/5=51.2
So rate of interest =(100xSI) /pxt
=100x51.2/640x1
=8%
Then intrest for 3 year 850=850x8x3/100=204
Amount =850+204=1054