Question

subba rao started work in 1995 at an annual salary of Rs5000 amd received an increment of Rs200. each year in which year did his income reach Rs7000​

Answer 1

Answer:

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Answer 2

★$\huge\bf{\blue{\underline{Question:-}}}$

subba rao started work in 1995 at an annual salary of Rs5000 amd received an increment of Rs200. each year in which year did his income reach Rs7000

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★$\huge\bf{\green{\underline{Explanation:-}}}$

• The annual salary received by Subba Rao in the years 1995,1996,1997 up to is 5000, 5200, 5400,up to 7000 

•  The incomes that Subba Rao obtained in various years are in A.P. as every year, his salary is increased by Rs 200.

• Therefore, the salaries of each year after 1995 are

5000, 5200, 5400, …

Given:

a = 5000

d = 200

• Let after nth year, his salary be Rs 7000.

 an = a + (n − 1) d

7000 = 5000 + (n − 1) 200

200(n − 1) = 2000

(n − 1) = 10

n = 11

Thus in 11th year, his salary will be Rs 7000.

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