PFLOPs is no longer a ”supercomputer” thing. Now you can purchase NVidia DGX-1 with Tesla V100 for $150K. This gives you almost a petaflops. If I am reading it right, price of 1 PFLOPs in above mentioned super computer is $6M. That’s insane.
Money laundering?
The architecture of this machine isn't clear yet, probably they have GPUs doing some co-processor work. Also since it's primary function is dynamic weather modeling, GPU runtime for the same should be available.
I don't think all of 400 crore allocation went to building this particular machine; entire met department is migrating to dynamic modeling.