Question

Gopi saves Rs 500 in frist week,Rs 600 in second week,Rs 700 in third week and so on.find the amount saved by gopi in 15th week .also find the total amount saved?

Answer 1

Answer:

1st week saves =$500

2nd week saves =$600

3rd week saves =$700

15th week saves =$(500+600+700+100)=1900

total he saves =sum of the $ he saves

=$18000

Answer 2

Savings:

Ist week=500

2nd. = 600

3rd: =700

15th week?

sn=n/2{2a+(n-1) d}

SI5=15/2{1000+I4x100}

= 15/2x2400 = 18000

SAVINGS=Rs18OOO