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 an = 7000


We know, an = 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.


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