At the back of the sink or toilet, the ceiling height can be as low as 60 inches. Vanity and sink heights have no requirements for height; the recommendation is that they fit the height of the user, ranging from 32 to 43 inches.
Although Tokyoâs population is projected to decline, it will remain the worldâs largest city in 2030 with 37 million inhabitants, followed closely by Delhi, whose population is projected to rise swiftly to 36 million in 2030.
Which one you regard as the holder of the title, all depends on what you mean by city. Most experts will tell you that Tokyo is the world's largest metropolis, with a population of about 36 million people. But the core of the city has only eight million people living in it.