Answer:
2500 km
Explanation:
If 1 cm is equal to 50 km, we can multiply the 1 cm by 50 to get 50 cm. In order to do this, we also have to multiply the 50 km (which was equal to the 1 cm) by 50 as well.
50 x 50 = 2500
Whatever we do to one side, we have to do to the other to make it equivalent.