Question

A certain sum of money at simple interest amounts to Rs 1300 in 4 years and to Rs 1525 in 7 years.
The rate percent per annum is​

Answer 1

Answer:

Explanation :

1525 - 1300 = 225 for 1.5 yrs (3.5 - 2)

So for one yr 225 / 1.5 = 150

then for 2 yrs interest is 150 + 150 = 300

Then principal 1300 - 300 = 1000.

Now 150 / 1000 * 100 = 15%