Question

a rectangular swimming pool measures 15 m by 10 metre how wide must a concrete walk around the pool be if the walk is to have a perimeter of 66 m

Answer 1

It must be 4 metre wide

By each metre wider you make it you must ad 1 to all sides

If you make it 4 metre wide:

15+4+15+4+10+4+10+4= 66

hope this helps ^^