EXPERTS,

Jobanpreet applied for a teaching job got selected. She has been offered the job with a starting monthly salary of RS. 12500 with an annual increment of RS. 1250 .Find her salary after 15 years of service .Also, find the total amount received by her in 15 years.

this follows A.P 12500 , 13750 , 15000 , .......15th term

a=12500

d=1250

n=15

a_n=?

using the formula a_n=n/2 { a+ (n-1) d}

a_n = 15/2 {12500 +(15 -1) 1250}

= 15/2 {12500 + 17500}

= 15/2 * 30000 = 15 * 15000 = 225000

so his will be 2,25,000 after 15 years with annual incerment of 1250

HOPE THIS HELPS !!