Question

aniket invested Rs. 4000 in the 1st year Rs. 6000 in 2nd year Rs. 8000 in 3rd year in national saving certificate scheme. how much amount did he invest in 10 year?​

Answer 1

Answer:

180000

Step-by-step explanation:

Money invested in first year=4000

Money invested in second year=6000

Money invested in third year=8000

Money invested in 10 years= 8000+6000+4000×10

=18000×10

=180000

Answer 2

Step-by-step explanation:

Ankit invested RS 4000 , RS 6000 and RS 8000 in the 1st , 2nd and 3rd year respectively .

This forms an AP

AP: 4000 , 6000 , 8000 , ..........

a=4000

d=6000-4000=2000

n=10

a10=?

an=a+(n-1)d

a10=4000+(10-1)2000

a10=4000+9(2000)

a10=4000+18000

a10=22000

Hence , he invested RS 22000 in the 10th year .