3.

An oil rig lies 20 km off the coast of Newfoundland. A town lies 80 km along the coast from

the nearest point on land to the rig. A pipe is to be drilled from the rig to the town. The cost

per km of the pipe underwater is $2.5 million, but on land is $1.5 million. Find the route that

results in the cheapest pipeline, and determine that lowest cost