These are resources that have been surveyed and their quality and quantity have been determined for utilization. The development of resources depends on technology and the level of their feasibility. For example, India has a cumulative total of 2,47,847 million tones of coal resources., Surveyed resources whose quantity and quality have been identified for utilization are known as developed resources. The level of development depends upon the level of technology. Fossil fuel resources are examples of developed resources., Resources that are surveyed and their quantity and quality have been determined for utilization. The development of resources depends upon the technology and level of their feasibility Example: Petroleum and natural gas from Bombay high.