A $285$ cm high masonry column with a square $(290$ mm$)$ cross$-$section is

designed to be built of DOT$/8$ solid bricks and B$1$ cement mortar to

support $20$ kN axial vertical load. However, due to some architectural

constraints it is decided that the dimension of the square crosssection should be reduced to $190$ mm$.$

$$ Is the design adequate with the revised dimensions for the column?

$$ If not, what should be done, so that the factor of safety will not

change? Use Graf formula with medium workmanship. Assume $1$ kg $=$

$10$ N