Question

a student saves Rs 1 on first day Rs 2 on second day Rs 3 on third day and so onthen during mo month of April he has saved Rs

Answer 1

Answer:

Step-by-step explanation:

a=1

d=1

Since April has 30 days,

n=30

Sn=?

Sn=n÷2(2a+(n-1)d)

Sn=30÷2(2×1+(30-1)1)

Sn=15(2+29×1)

Sn=15×31

Sn=Rs 465.

HOPE THIS HELPS YOU

Answer 2

Consider this in an Arithematic progression

1,2,3,4.............29,30

There has a proper equation to find the sum

But simple Here it is

add 1+30=31
and 2+29=31

.......
.......
15 pairs

so on....Dont be confused ,
Here how many 31 we get, 15 Right

To find the total 15 ×31
Which is 465

In My View
This student saves quite a good Amount of Money.