Question

2) In what time will the simple interest on a certain sum of money at 7½% per annum be of itself?(5 years) ​

Answer 1

Answer:

Let the sum be x.

Using formula,

I=100PRT=100x×1215×215−100x×128×225=32.50

⇒240025x=32.50

⇒x=2532.50×2400=3120

∴ Required sum =Rs.3120