Observation

Most of the candidates did not attempt this question. It is believed, therefore, that they either found it hard or condered other questions easier.
The soolution  with the step-by-step requirement for the question, the lack of knowledge of which made the students not to perform well, is given below.

DRAWING THE GIVEN ELEVATION, ITS PLAN, END VIEW IN A GIVEN DIRECTION AND THE TRUE SHAPE OF ITS CUT SURFACE

MAJOR REQUIREMENTS
COPYING THE GIVEN VIEW

• Drawing of the centre
• Drawing of the cone (base, height and sides
• Drawing of the cutting plane  

PLAN

• Drawing of the two centre lines of the circle 
• Drawing of the base circle and dividing it into 12 equal parts
• Joining the centre of the circle to the divisional points 
• Projecting up from the divisional points to the base of the cone in elevation
• Joining the points on the base to the apex
• Projecting down from the cutting plane to the radial lines on the circle
• Locating the points of intersection on the radial lines
• Joining the points to complete the plan  
• Hatching                                            

END VIEW IN THE DIRECTION OF ARROW M

• Drawing of the centre line
• Projecting horizontal lines from the cut surface from the front elevation
• Projecting from the plan (cut surface, base circle) vertically to the
  end elevation 
• Locating the points of intersection
• Joining the points to complete the end elevation
• Hatching the cut surface in the end elevation 

TRUE SHAPE OF THE CUT SURFCE

• Projecting perpendicular lines from the cut surface
• Drawing the reference line X-X
• Transferring corresponding coordinates from the cut surface on the plan
  to the reference line for the true shape
• Joining the points for the curve 
• Hatching the true shape  

Addendum

• For using the correct scale (1:1) 
• For neatness and quality of line work