<PRE><B>Question 762963</B>
Area for the rectangular form of board is 54*90=27*2*9*2*5=3*3*3*2*3*3*2*5=3^5 * 2^2 * 5 =9*2*sqrt(15)=18*sqrt(15)

54:  {{{3*3*3*2}}}
90: {{{3*3*2*5}}}
Common factor is 2*3*3=18
{{{90/18=5}}}
{{{54/18=3}}}
The noncommon factors may give what we want.


{{{324*15=54*90=4860}}}
324 squares of side 15 cm each  </PRE>