The present price of a scooter is Rs. 7,290. If its value

The present price of a scooter is Rs. 7,290. If its value decreases every year by 10%, then its value 3 years back was

Using Rule 18,

A = P		1 -	R		³
			100

⇒ 7290 = P		1 -	10		³	= P		9		³
			100					10

⇒ 7290 = P ×	9	×	9	×	9
	10		10		10

⇒ P =	7290 × 10 × 10 × 10	= Rs. 10000
	9 × 9 × 9