This question cannot be answered sensibly. A square metre is a measure of area, with dimensions [L2]. A running metre is a measure of distance, with dimensions [L]. The two measure different things...
There are 1000 metres in one kilometre. Therefore, 55 metres is equal to 55/1000 = 0.055 kilometres.
There are 0.3048 metres in one foot. Therefore, 55 feet is equal to 55 x 0.3048 = 16.764 metres.
There are 0.9144 metres in one yard. Therefore, rounded to three decimal places, 5.5 metres is equal to 5.5 / 0.9144 = 6.015 yards.
There are 1000 metres in one kilometre. Therefore, 5.5 kilometres is equal to 5.5 x 1000 = 5500 metres.