An old map was plotted on a scale of 40 m to 1 cm. Over the year, this map has been shrinking and a line originally 20 cm long is only 19.5 cm long at present. Again, the 20 m chain was 5 cm too long. If the present area of the map measured by planimeter is 125.50 cm2, then the true area of land surveyed is ______ hectares.21.23

An old map was plotted on a scale of 40 m to 1 cm. Over the year, this

1.	An old map was plotted on a scale of 40 m to 1 cm. Over the year, this map has been shrinking and a line originally 20 cm long is only 19.5 cm long at present. Again, the 20 m chain was 5 cm too long. If the present area of the map measured by planimeter is 125.50 cm2, then the true area of land surveyed is ______ hectares.21.23
Answer» An old map was plotted on a scale of 40 m to 1 cm. Over the year, this map has been shrinking and a line originally 20 cm long is only 19.5 cm long at present. Again, the 20 m chain was 5 cm too long. If the present area of the map measured by planimeter is 125.50 $c m^{2}$ , then the true area of land surveyed is ______ hectares. 21.23

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