Question

Mr.Subbarao started work in $2014$ at an annual salary of $Rs.10,000$ and receive an increment of $Rs.750$ each year. In which year did his income reach $Rs.17,500$

Answer 1

This is an AP problem

His salary increases in AP with a C.D

$\therefore 750$ and initial term $10000/-$

So let the nth term is $17500$

$17500=10000+(n-1)750$

$7500=750(n-1)$

$10=n-1$

$\therefore n=11$