Answer:
64.
Step-by-step explanation:
We identify in the original equation what data we have and what we lack:
![(Y)/(L) =50*(K)/(L)](https://img.qammunity.org/2020/formulas/business/college/l5y2tu4e3ddtntw86ei7jp61pwz5fj5yhi.png)
The problem statement gives us Y / L, which is the real GDP per worker = 3200, so we would lack K / L, which is the physical capital per worker, precisely, the data requested by the exercise. Therefore:
![3200=50*(K)/(L)](https://img.qammunity.org/2020/formulas/business/college/2mkb9tnakx1sv7qr6aqla1a0eo6oid3f60.png)
To find K / L we make a simple clearance:
![(K)/(L) =(3200)/(50)](https://img.qammunity.org/2020/formulas/business/college/i4goo6nrj1y8zw7fp9ymy2899lreyy40jd.png)
![(K)/(L) =64](https://img.qammunity.org/2020/formulas/business/college/5wxwkk79zbpuccf6cldww0h57pqm296krf.png)
The physical capital equals 64.