Question

find the rate of interest by which a sum will tripple itself in 16 year​

Answer 1

Answer:

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% mark thank and brainlist if it helped you

Answer 2

Hola Mate! Let's solve the problem -

$\;\mapsto\;\;\underline{\underline{\bf{\blue{Solution}}}}$

Let the rate of interest and sum of money be R% p.a and Rs. P respectively.

Given, A = 3P, T = 16 years

Amount = Principal + S. I.

$\therefore$ A = P + S. I.

$\implies$ S.I. = A – P

$\implies$ S. I. = 3P – P = 2P

So, S. I. = $\frac{PRT}{100}$

$\Rightarrow$ 2P = P × R × T /100

$\implies$ R = $\frac{200}{16}$

$\rightarrow$ R = 12.5%

Hope it helps you dear.