Question 754148
What you have here is a rectangle and a circle
(two semicircles either end)
Using the radius of 0.5m we have
2 x 3 metres length (2 + 2 1/2 wheels)
and the circumference of the circle
radius 0.5m = 1.0 m diameter
Circumference = pi*d
              = 3.14m
Total length = 6m + 3.14m
             = 9.14m