Question

The present population is rs 2000000 after how many years the price will be rs1458000 if its price reduces by 10% per annum find it

Answer 1

Answer:

Step-by-step explanation:

present=2000000

decline rate=10 percent

=(10/100) x 2000000

=200000

hence,in the arithmetic progression,

a=2000000,d=(-200000) An=1458000

An=a+(n-1)d

1458000=2000000+(n-1)(-200000)

-542000=(n-1)(-200000)

542000/200000=(n-1)

271/100=(n-1)

2.71=n-1

3.71=n

1 year=12 months

3.71 years=?

3.71 x  12=44.52 months

=3 years and 8 months(roughly)