. If a man saves ` 4 more each year than he did the year before and if he saves ` 20 in the first year, after how many years will his savings be more than ` 1000 altogether?
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20,24,28.........1000
a=20 d=24-20=4 sn=1000
sn=n/2*(2a+(n-1)d)
1000=n/2(2*20+(n-1)4)
2000=n(20+4n-1)
2000=19n+4n^2
4n^2+19n-2000=0
solve this youll get the right answer
i am sorry i couldnt complete the answer as i am in a bit hurry
pls forgive me
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