Question

What will be the salary of a person in the year 2020, whose salary in the year 2016 is Rs.10,000, which increases Rs. 1500 every year ?

Answer 1

As the increase (increment) is fixed then it becomes a_n A.P. 

His starting salary in 2016, 

= First term of that AP (a) 

So (a) = 10,000/- 

Increase of salary in every year 

= Common difference 

(d) = Rs.1500/- 

∴ His salary in 2020= 5th term in that A.P.

∴ a₅ = a + (n – 1) d 

= 10,000 + (5 – 1) (1500) 

= 10,000 + 4 (1500) 

= 10,000 + 6000 = 16,000/- 

His salary in year 2020 is 16000/-