Grade 7: Perimeter & Area: Real World Problems: Worksheet 1 Find the area of the actual picture and the area of the margin in sq m. A compound of width 3.25m is to be constructed all along the outside of a building of length 23.5 m and width 13.5 m. Find the cost of cementing the compound at the rate of $ 2/- per sq m. A square mango orchard of side 40 m, has a path all along the inside of width 2m.