The difference between simple and compound interest (compounded

The difference between simple and compound interest (compounded annually) on a sum of money for 3 years at 10% per annum is Rs. 93. The sum (in Rs.) is :

Given that , Principal = ? , Difference = C.I. - S.I. = Rs. 93 , Time = 3 years , Rate = 10%
Using the given formula ,

Difference between C.I. and S.I. for 3 years =	Pr²(r + 300)
	1000000

⇒ 93 =	P × 100(10 + 300)
	1000000

⇒ 93 =	P × 100 × 310
	1000000

⇒	31P	= 93
	1000

⇒ P =	93000	= Rs. 3000
	31