If earth didn't spin on its axis but still revolved around the sun, how long would an earth day be?

If Earth was just revolving around the Sun, but was not spinning around it's own axis, than we would've had two big contrasts on the Earth, on the one side we would've had an endless day, and on the other side an endless night. This is due to the fact that one half of the Earth would always be directed towards the Sun, while the other will never be directed towards the Sun.The one part where there would be constant day will be very hot, while the other part with the constant night will be extremely cold.

Today it is one of the first problems of Egypt, that having such a high population density in this area makes the quality of human life less.

The great problem is that the majority of its population has a poorly developed socio-economic level since the country's economy has not expanded at the same rate as its inhabitants.

Explanation:

Man tends to want more and more well-being. Throughout the world the number of vehicles and refrigerators is increasing rapidly. The time will come when population growth and increased prosperity collide. Large flows of people may have to travel the world in search of food and prosperity.