Ben sat outside of his school and made a note of the first 100 cars to pass.
27 were red
In Britain ther are 35 million cars on the road
Use Bens finding to give an estimate of how many red cars are on the road

You have 2 sides that are 2 cms and you have 6 sides that are 1/2 cm and you have 4 sides that are 1 cm. the smallest sides are 1/2 the medium sized sides are 1 and the smallest are 1/2. so to find the perimeter you have to add them all up together so your answer will be 11 cm's