When there was no cement, how were tall buildings built? How were Taj Mahal, Qutub Minar and Red Fort built?
India is a historically rich country. Hundreds of years old buildings still exist in India.…
2 months ago
cement
Cement is most widely used thing made by humans in world
Today's human was first a primitive human. Gradually his mind developed and he invented everything…
2 months ago
know the difference between concrete and asphalt damar road
Road Types: At one time there were no roads to walk on. People used to…
1 year ago