Question: How long is the bicycle trail that is near the Melbourne Zoo?
Related documents: [0]  [DOC] The Capital City Trail is a shared use path for cyclists and pedestrians, which circles the Melbourne city centre and some inner eastern and northern suburbs of Melbourne, Victoria, Australia. It is 29km in length, and mostly consists of sections of other trails, such as the Merri Creek Trail, Main Yarra Trail, Moonee Ponds Creek Trail and Inner Circle Rail Trail. [END] 
[1]  [DOC] The Royal Melbourne Zoological Gardens, commonly known as the Melbourne Zoo, contains more than 320 animal species from Australia and around the world. The zoo is 4 km north of the centre of Melbourne. It is accessible via Royal Park station on the Upfield railway line, and is also accessible via tram routes 58 and 19, as well as by bicycle on the Capital City Trail. Bicycles are not allowed inside the zoo itself. [END] 
Answer: 
29km
29km