Question

a sum triples itself at simple interest in 10 years when the rate of interest is

Answer 1

As you say sum tripled in 16 years then,

time (T)= 16 years

Amount (A) = 3 * Principal (P)

As we know

Interest(I)=Amount - Principal

I=2*p

we know that

I = P*R*T/100

So, 2*P =P*R*16/100

R= 12.5%

So rate of percentage per annum must be 12.5% to triple the sum.

hope it helps uu!!

Answer 2

a sum triples itself at simple interest in 10 years when the rate of interest is
As you say sum tripled in 16 years then,

time (T)= 16 years

Amount (A) = 3 * Principal (P)

As we know

Interest(I)=Amount - Principal

I=2*p

we know that

I = P*R*T/100

So, 2*P =P*R*16/100

R= 12