Detailed topographic map of the landscape near Petřín hill is given by[br]contour lines at every 1 meter. [br]1. Determine the numerical map scale 1 : m. [br]2. Estimate the true length of funicular portion f.[br]3. Estimate the average slope between elevations 230 m-250 m.[br]4. Construct cross profile p with appropriate exaggerated scale.