Q. 54.3( 60 Votes )

Sanjay gets fixed monthly income. Every year there is a certain increment in his salary. After 4 years, his monthly salary was Rs. 4500 and after 10 years his monthly salary became 5400 rupees, then find his original salary and yearly increment.

Answer :

Let the original salary be 'x' and yearly increment be 'y'


After 4 years, his salary was Rs. 4500


x + 4y = 4500


x = 4500 - 4y eq.[1]


After 10 years, his salary becomes 5400


x + 10y = 5400


4500 - 4y + 10y = 5400


6y = 900


y = 150


Putting this in eq.[1],


x = 4500 - 4(150)


x = 4500 - 600 = 3900


Hence, his original salary was Rs. 3900 and increment per year was 150 Rs.


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