Answer:
54°
Step-by-step explanation:
In the given pie chart which shows variation of vegetable. 
Pie chart is a circular. Complete angle of circular is 360°.
100% of pie chart is equal to 360° of central angle. 
Here, we need to find the central angle of corn. 
In graph, corn is only 15% 
  100% of central angle = 360°
    1% of central angle 
15% of central angle  
                                   
Hence, The central angle of corn is 54°