Question

a ditirequired rupees 2500 after 12 weeks to send her daughter to school she saved rupees hundred in the first week and increase her weekly saving by rupees 20 every week find whether she will be able to send her daughter
after 12 what value is generated in the above situation

Answer 1

a=100 d=20 n=12
Sn=6(200+(11)20)
=6(420)
=2520
she will be able to send her daughter to school
value : small savings can Help us a lot

Answer 2

AP = 100+120+140+An

N = 12

A = 100

D = 20

An = A+(N-1)D

= 100+(12-1)20

= 100+220 = 320

The required An = 320

Then , Sn = N÷2{2A+(N-1)D}

= 12÷2 {2×100+(12-1)20}

= 6×450 = 2520

So , she will be able to send her daughter to school after 12 weeks .