Sachindahiya27 Revenue isn't just dependent upon the level of traffic you're getting. It also depends on the quality of traffic, location your visitors come from etc.
Your visitors are largely coming from India, which is a country with low paying ads. Unfortunately due to the content you're creating this isn't really something that you can change. Your best bet will be to focus on creating new content and SEO so you can grow your overall traffic and then this'll improve revenue over time.