How many years it would take to spend Avogadro's number of rupees at the rate of 10 lakh rupees per second?

Options

A. `1.91xx10^(10)"year"`
B. `2.91xx10^(10)"year"`
C. `3.91xx10^(10)"year"`
D. `4.91xx10^(10)"year"`

Answer

A

Explanation

`10^(6)` reupee invested in `1 sec`.
`therefore 6.023xx10^(23)`rupee invested in
`=(1xx6.023xx10^(23))/(10^(6))sec`.
`=(6.023xx10^(23))/(10^(6)xx365xx24xx3600)yr`.
`=1.91xx10^(10)yr`.