What is the speed limit in an area where the following road sign is placed (and no other road sign indicates otherwise)?

1. 60 k.p.h.
2. Correct answer: 50 k.p.h
3. 30 k.p.h.
4. There is no speed limit.

WhyThis sign stands at the entrance to an area where the maximum speed is 50 KPH, unless another sign says otherwise. There is no road without a speed limit.