The exact value of R.F. on an isometric scale is

SOLUTION

Representation Factor (R. F)

\({\rm{R}}.{\rm{F}} = {\rm{}}\frac{{{\rm{Length\;of\;object\;on\;drawing}}}}{{{\rm{Actual\;length\;of\;the\;object}}}} = \frac{{\cos 45^\circ }}{{\cos 30^\circ }} = \frac{{1/\sqrt 2 }}{{\sqrt 3 /2}} = \sqrt {\frac{2}{3}} \)