Question

find the rate percent p.a.will a sum of Rs 4000 yield a C.i of Rs 410 in 2 years

Answer 1

Let R% be =x%
C.I=Rs 410
Time = 2 years
principal= Rs 4000
C.I = P(1+R/100)t.sq. unit
410= 4000(1+x/100)2.sq. Unit
410= 4000×100x/100 ×100x/100
410= 4000× X ×X
410/4000= x.sq. Unit
41/400= x .sq.unit
R%= 41 root under 20 %.