SubbaRao started work in 1995 at an annual salary of Rs 5000 and received an incrementof Rs 200 each year. In which year did his income reach Rs 7000?

Here, a = 5000, d = 200 and a_n = 7000

We know, a_n = a + (n – 1)d

, 7000 = 5000 + (n – 1)200

(n -1)200 = 7000 – 5000

(n – 1)200 = 2000

n – 1 = 10

n = 11

Thus, 1995 + 10 = 2005

Hence, his salary reached at Rs. 7000 in 2005.