The Price of an article increase by 20% every year.  If the difference between the price at the end of third and fourth year is Rs 230.4, then 40% of the price (in Rs.) at the end of the second year is:

384

Let the amount at the end of 2nd year = Rs.100

So, the amount at the end of 3rd year = Rs.120

and the amount at the end of 4th year = Rs.144

ATQ,

⇒ 144R - 120R = 230.4

⇒ 24R = 230.4

⇒ 1R = 9.6

Hence,

The amount at the end of 2nd year = 100R = 100 × 9.6 = Rs.960

⇒ 40% of 960 = Rs.384