9.Asum of money lent out at simple interest doubled itself in 20years.

1.	9.Asum of money lent out at simple interest doubled itself in 20years. In how many years willit treble itself?
Answer» Let the sum of money be XSI=Amount-PrincipalIn this case, Simple Interest is = X SI=PRT/100X=XR20/100100x/20x=R5%=R Now the X is tripled,In this case SI=3x-x=2x SI=PRT/1002x=X5T/1002x/X=T1/20220=T40=T So it will take 40 years to make the sum of money tripled.

9.Asum of money lent out at simple interest doubled itself in 20years. In how many years willit treble itself?

Answer»

Let the sum of money be XSI=Amount-PrincipalIn this case, Simple Interest is = X

SI=P*R*T/100X=X*R*20/100100x/20x=R5%=R

Now the X is tripled,In this case SI=3x-x=2x

SI=P*R*T/1002x=X*5*T/1002x/X=T*1/202*20=T40=T

So it will take 40 years to make the sum of money tripled.