Question

PLS!!!!!! DO!!!!!!!!

in how much time will the interest on a sum of money will be half the money at 5% per annum?

Answer 1

Let the amount of money in the beginning be p,


Now as we know
$SI = \frac{p \times r \times t}{100}$
where r = rate and t is time (years).

Here
after t time, let the SI to be halved,
So the new equation be,

$\frac{p}{2} = \frac{p \times 5 \times t}{100} = \frac{pt}{20} \\ \frac{p}{2} = \frac{pt}{20} \\ t = 10$

Therefore the time taken will be 10 years.