Kamla has triangular field with sides 240 m , 200 m , 360 m where she grew wheat . In another triangular field with sides 240 m , 320 m , 400 m adjacent to the previous field , she wanted to grow potatoes and onions . She divided the field in two parts by joining the mid- point of the longest side to the opposite vertex and grew potatoes in one part and onions in the other part . How much area (in hectares) has been used for onions?
Clue : 1 hectare =10000 sq.m