Question

inside a Square Garden of side 158 m a Road 4m wide is built around what is the area of the remaining part of the garden

Answer 1

if a road of width is built on all four sides of the garden then the area of the  remaining part of the garden is the the area of the new square whose side is 158-8=150
therefore the area of the remaining area = s*s
                                                                =150*150
                                                                =22500m²