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Subba rao start working in 1995 …

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Subba rao start working in 1995 at an annual salary of rupees 5000 and receive and increase mint of rupees 200 each year in which year did his income reach to rupees 700

Posted by Harshita Kumari 6 years, 2 months ago

CBSE > Class 10 > Mathematics

1 answers

Yogita Ingle 6 years, 2 months ago

The annual salary received by Subba Rao in the years 1995,1996,1997..... is 5000, 5200, 5400,...... 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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