Given:
A square grossy plot is of side 100 meter.
width of the gravel path is 10 meters.
outer side of the grossy plot = 100m
The area of the outer side = side x side.
= 100 X 100 =10000 square meter.
Inner side of the grossy plot = 100- (2 x 10)
= 100-20 =80m.
Inner area of the grossy side = side x side
=80 X 80 = 6400 square meter.
Now, to find the area of the gravel path. use the formula,
Area of the gravel path = outer side of the grossy plot - inner side of the grossy plot
= 10000 - 6400 = 3600 sq. meter
The area of the path is 3600 sq. meter.