How many meters in 1 hectares?

An are is a measure of area.

A meter is a measure of length and has no width, so its area is length x 0 = 0 m2

So no mater how many meters you have, they will never cover an area of 1 are, let alone 1 hectare.

If you meant how many square meters in 1 hectare, then:

1 hectare = 10000 m2