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.
The most populous country in the world is China with 1,350 million recorded in 2010, representing 20% of the total world population. Chinaâs population increases annually about 10 million people.Other Interesting: 1  Largest Cities in the World by Population.hinaâs population increases annually about 10 million people. The worldâs most populous country overcame the barrier of 1,000 million in 1980 and it is expected that by the year 2043 will reach 1.550 million, a figure which growth would stagnate.