Bihar is located in the eastern part of the country
(between 83°-30' to 88°-00' longitude). It is
an entirely land-locked state, although the outlet to
the sea through the port of Kolkata is not far away.
Bihar lies mid-way between the humid West Bengal in
the east and the sub humid Uttar Pradesh in the west
which provides it with a transitional position in respect
of climate, economy and culture. It is bounded by Nepal
in the north and by Jharkhand in the south. The Bihar
plain is divided into two unequal halves by the river
Ganga that flows through the middle from west to east.