Answer:
The Andrews is A. 90km
Explanation: so far 1cm is equal to 45km on the map. That Means that a unit distance on the map is actually 4, 500, 000units (i.e 45 x 1000 x 100) in real life.
So if 1 cm represents 45km
2cm will represent 2 x 45km which gives 90km.