[Qgis-user] Measuring area of a selected row in attribute table

[Manoj Soni]

Dear Users

I am very new to QGIS. We can draw area and can measure area using
measuring tools.

According to attribute table, i just want to measure area of a selected row
in table. How can we measure  it.

For example, i have a shape file having some cities name in attribute
table, when i selected one row, that city area is highlighted.

How can i measure that selected area only?. I do not want to make a
selection manually.

Many Thanks
Regards
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