Question

finnnnnnnnnnnnnnddddddddddddddddddddddd​

Answer 1

Answer :

Sanika saves Rs. 10 on first day, Rs 11 on second day , Rs 12 on third day,..

Therefore, 10,11,12.. is the sequence.

Common difference = d = 11-10 = 12 - 11 = 1 which is constant.

Hence, 10,11,12.. is an AP

a = 10

d = 1

Now,

Year 2016 is a leap year.

A leap year has 366 days.

So, n = 366

Total savings in 366 days = S366.

S366 = 366/2 [ 2 × 10 + (366-1) 1 ]

= 183 × ( 20 + 365 )

= 183 × 385

= 70,455

S366 = 70,455.

Hence, Sanika saved Rs. 70455.