How many grounds in an acre of land?

Answer 1

An acre is 4840 sq yd. This is the approximate area of a square with sides of 70 yd, or a rectangle with length 100 yd and width 50 yd.

A "ground" is an informal unit of area measurement used in India, particularly the southern parts. Depending on the locale, it equals somewhere between 2,150 square feet and 2,400 square feet. So there is somewhere around 18 to 20 grounds in an acre.