dunno if this will help mr singh, but i had my driveway done about 22 months ago.
now i live in a terrace so its a long thin driveway as i wanted a garage, then an extended piece of concrete leading to a mudtrack then the main road.
basically what i asked for was 10ft by 40ft concrete driveway, with all the under-concrete to be dug up and sorted too. did all this and layed i think about 7-8 inches worth of concrete over two layers from what i remember. im a bit sketchy on the details now, but did an excellent job of it, with a raised part for the garage to go on for extra support.
all this cost me £1200-1300 i think, and it really was an excellent job from a renound and respected local company.
hth
andy