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Q.
Sushma joins a job at 20 yrs. First 3 years salary is 10,000 p.a. Afterwards every year increment of 2,000 per year for 10 years. Then salary becomes constant till retirement. At retirement average salary is 25,000. (throughout career). At what age Sushma retires ?
A.
50 yrs
B.
47 yrs
C.
45 yrs
D.
42 yrs
View Answer
Correct choice: A
Explanation:
Let age of retirement = S so according to the given condition 25000(x-20) =10000 x 3 + 12000 + 14000 + 16000 + 18000 + 20000 + 22000 + 24000 + 26000 + 28000 + 30000 + 30000(S-33) = 30000 + 210000 + 30000S-990000 = 30000S - 750000 or 25000S - 500000 = 30000x - 750000 or 5000x = 250000 or S = 50 yrs.
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