Question

a person deposits Rs 1000 in the first month then every month he increase monthly deposit by Rs 60 calculate his total investment at the end of 2 years ( ans : 40,560 )
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Answer 1

Answer:

here tge series is 1000,1060,1120,.....24 times

so here a = 1000

deposite = 60

& n =24

then total investment is,

Sn =n/2(2a+(n-1) d)

=24/2 (2*1000+(24-1) 60)

=12(2000+1380)

=3380*12

=40,560 ans

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