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

Explanation

`10^(10)` grains are distributed in `1s`
`6.023xx10^(23)` grains are distributed in
`(6.023xx10^(23))/10^(10)s=(6.023xx10^(23))/(10^(10)xx60xx24xx365)`
`=190800` years