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

Answer

A

Explanation

Avogadro number of rupees `=6.022 xx 10^(23)` rupees
Rupees spent per second `=10^(6)`
Rupees spent per year `=10^(6) xx 60 xx 60 xx 24 = 365`
`therefore 10^(6) xx 60 xx 60 xx 24 xx 365` rupees are spent in = 1 year
`6.022 xx 10^(23)` rupees are spent in
`=1/(10^(8) xx 60 xx 60 xx 24 xx 365) xx 6.022 xx 10^(23) = 1.91 xx 10^(10)` years