Length =10cm Breadth is unknown Since we are given the perimeter, we have to use the concept of perimeter to solve for the breadth Perimeter is the sum of all the dimensions of the shape Perimeter =26cm Perimeter =2× Length +2× Breadth Let breadth = B 26=2×10+2×B 26=20+2B 26−20=2B 6=2B Divide both sides by 2 Cancel out B=3 Since we know the length and breadth of the rectangle, we can calculate the area Area = Length × Breadth Length =10cm Breadth =3cm Area =10cm×3cm Area =30cm2