You are given a sentence and a question in the input. The information provided in the sentence should be enough to answer the question. You're expected to write the correct answer. Do not use any facts other than those provided in the sentence.
Q: Sentence: According to the 2011 census, Kathmandu Metropolitan City has a population of 975,453 and measures 49.45 km2 (19.09 sq mi). 
Question: How many square kilometers in size is Kathmandu?
A: 
49.45 km2.