It's possible to have a great seating n lounge kind. You have to choose the best ones, seating.

One Follow-up question.. Is there any strength issue with 20mm Granite slab over 40mm Granite.. Are the 20mm granite slab prone to chipping or crack on normal usage.. Usage would be like, chopping vegetables, keeping hot vessels,.. The normal usage what happens in normal indian kitchen.. I just want to be sure that I decide based on experts judgement (like you), as people are just throwing their opinion based on their guess...

i want an bay window to be projected outside,how will i give support will simply a concrete belt of four steel bars of window size which is six feet is enough or i have to connect through the side pillars by extending belt two another feet?

It depends on various factors like the size of the building, distance between pillars, and floor to floor height. But yes, as Joitree says, this is not something you can just find online. You have to consult a professional structural engineer