Question

in a square field of side 2km, 50 rectangular fields each of 10m lenght and 5m breadth are dug .find the remaining area

Answer 1

the remaining area = area of Sq. - area of rec.
area = 2000 - 50 *10 *5
area = 4000000 - 2500
area =3997500 m^2

Answer 2

side = 2 km =2000m
remaining area = area of square field - area of 50 rec. fields
=2000×2000-50×10×5
=4000000-2500=3997500m2=3997.5km2