Domain: culture (Cultural Knowledge and History)
Problem: A travel promoter in 1881 planned a grand tour starting from London with stops in New York, Cape Town, and Bombay before returning to London. He claimed that the entire journey would be completed within a total time limit equivalent to the one-way travel duration for the furthest destination shown on this map. Please identify the specific color-coded time zones for these three cities and determine the maximum upper bound in days to establish the total time limit T. Assuming the traveler maintains a constant average speed while traveling along Great Circle paths between each leg of the trip, what is the minimum constant speed in knots required to fulfill this promise? Please provide the final result as a single integer.
Answer: 26