Math, asked by annna42, 11 months ago

on 1st january 2016,sanika decides to save

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Answered by Priyanshu3008
15
here,a=10
d=1
and since the days between 1 Jan. and 31 Dec. are 365
therefore, n=365
we have to find the total savings till the date
so,it means we have to find the S365
let's go,

S365=n÷2[2a+(n-1)d]
S365=365÷2[20+(364)1]
S365=365(10+182)=365×192
S365=70080

Therefore, on 31st December 2016 Sanika's total savings would be 70080 rupees.


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