Answer No : 20 : 
import numpy as np  

a = np.array([[0, 1, 3], [5, 7, 9]])

b = np.array([[0, 2, 4], [6, 8, 10]])

c = np.concatenate((a, b), 1)

print("After Concatenating array and b: ",c)
Output:
After Concatenating array and b: [[ 0 1 3 0 2 4]
[ 5 7 9 6 8 10]]