A vertical pole of height 10 metres stands at one corner of a rectangular field. The angle of elevation of its top from the farthest corner is 30º, while that from another corner is 60º. The area (in m2) of rectangular field is
(1) 200√2/3
(2) 400/√3
(3) 200√2/√3
(4) 400√2/√3
