Question 889811
clock can be divided into 12 parts,making a total angle of 360¤.So 1 hour makes an angle 360¤/12=30¤.
6 hour makes an angle 30¤*6=180¤
20 minutes coincide with 4 of the clock.It makes an angle 30¤*4=120¤
the angle between 6 hours and 20 minutes 
                               =180¤-120¤
                               =60¤