how much time would it take to distribute on Avogadro number of wheat grains, if `10^(10)` grains are distribute each second ?

Explanation

Time taken to distribute `10^(10)` grains `= 1s`
Time taken to distribute `6.022 xx 10^(23)` grains `= (1x) ((6.022 xx 10^(23) "grains"))/((10^(10) "grains"))`
`= (6.022 xx 10^(13))/(60 xx 60 xx 24 xx 3.65)` years `= 1.9 xx 10^(6)` years.