Question

Find the rate of interest by which a sum will triple itself in 16 years

Answer 1

r=12.5%

principle is x
amount is 3x
SI is 3x-x=2x
time 16year
SI=prt/ 100
2x=x*r*16/100
r=(2x*100)/(16*x)
r=12.5%

Answer 2

Given that rate = 12.5%
Amount = 3x
principle = x
SI =3x - x = 2x
Time =16 years
SI=
2x=x*r*16/100
r=(2x*100)/(16*x)
r=12.5%
$\frac{prt}{100}$