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A man gets an employment of rs 6500 per month with an annual increment of rs 500.what will be his monthly salary after 15 years and what will be the total

First year he gets 78000 second year he gets 78500 third year he gets 79000 and so on His annual incomes are in arithmatic progression. a = 78000 d = 500 n = 15 a₁₅ = a+(n-1)d = 78000 + 14(500) = 78000 + 7000 = 85000 he gets 85000 as annual income after 15 years he gets 13500 as monthly salary after 15 years

total amount he earns in 15 years = n/2 [ 2a + (n-1)d ] total amount = 15/2 [156000 + 7000 ] total amount = 12,22,500 rs