How to trim multiple lines at an edge with one command

Trims all objects at the cutting edge specified by a selected polyline, line, circle, arc, ellipse, text, mtext, or attribute definition.

Summary:-

After selecting an object and specifying one side of the object, all other objects are trimmed to that object in a single operation.In the following illustration, EXTRIM is started and the large circle is selected as the cutting edge.

Use extrim  on command line to trim very fast