What is the full load primary current of a 3000/150 V, 30 kVA transformer

What is the full load primary current of a 3000/150 V, 30 kVA transformer:

1. 2 A
2. 5 A
3. 10 A
4. 20 A

Correct answer: 10 A

Solution: I = kVA/Primary voltage = 30 kVA/3000 = 30 * 1000 / 3000 = 10 A