A trolley wire weighs 1 kg per metre length. The ends of the wire are attached to two poles 20 m apart. If the horizontal tension is 1000 kg, the central dip of the cable is

A trolley wire weighs 1 kg per metre length. The ends of the wire are

1.	A trolley wire weighs 1 kg per metre length. The ends of the wire are attached to two poles 20 m apart. If the horizontal tension is 1000 kg, the central dip of the cable is
A.	2 cm
B.	3 cm
C.	4 cm
D.	5 cm.
Answer» E.