Answers

2016-03-08T18:34:11+05:30
After 43 years or 525 months.

0
2016-03-08T18:42:47+05:30
Savings of the person are
200, 225, 250, 275 and so on....
Total savings = Sn = 13325 
 S_{n} =  \frac{n}{2} [2a+(n-1)d]
Here Sn = 13325, a = 200, d = 25

13325 =  \frac{n}{2} [2(200)+(n-1)25]

13325 =  \frac{n}{2} [400+25n-25]

26650 = 375 + 25n

25n = 26275

n = 1051

No. of months = 1051
0