An electric pole is 10m high. A steel...

An electric pole is 10m high. A steel wire tied to top of the pole is affixed at a point on the ground to keep the pole up right. If the wire makes an angle of `45o` with the horizontal through the foot of the pole, find the length of the wire.

`(10)/(sqrt(2))m`

20 m

14 m

`10sqrt(2)m`

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