Question

How did the assumption of Diwani benefit the East India Company

Answer 1

The assumption of Diwani benefited the company as they started to use to collect revenues from Bengal for his own colonial interests and they neglected Bengal completely. It purchased goods in India with these revenues, as a result, the outflow of gold and silver from Britain got completely stopped.

Answer 2

the assumption of diwani allowed the company to use vast resources of bengal.
this solved a major problem the company faced earlier.
the company could get silk textiles and other useful products oif india that had a great demand in europe