Problems with perimeter

Question

A farm has three boundary lines. Three farm workers each measured a different boundary. John found one boundary measured 1.72 km, Kim noted that her assigned boundary is 2 km 55 m long and Ali recorded the shorter boundary to be 378 m. What is the perimeter of the farm?

Answer 1

1.72 + 2.055 + .378

= 4.153 km = perimeter = sum of all sides

1 km = 1000 m